/* =========================
   THEME SYSTEM — Seasonal Colors
   ========================= */

/* Base transitions for smooth theme switching */
html {
  transition: background-color 0.6s ease, color 0.6s ease;
}

body {
  transition: background-color 0.6s ease, color 0.6s ease;
}

/* Transition all color-related properties on key elements */
.site-header,
.hero-banner,
.hero-overlay,
.hero-content,
.page-content,
.sidebar,
.tree-panel,
.viewer-panel,
.card,
.contact-email-card,
.calendar-event,
.calendar-event-card,
.board-member-card,
.board-skeleton,
.calendar-skeleton,
.site-footer,
.footer-logo-icon,
.main-nav,
.nav-link,
.logo,
.menu-toggle,
.tree-folder-toggle,
.tree-file,
.viewer-meta,
.download-btn,
.calendar-more,
.contact-email-link,
.card-arrow,
.theme-dropdown-toggle,
.theme-dropdown-btn {
  transition: background-color 0.6s ease,
              color 0.6s ease,
              border-color 0.6s ease,
              box-shadow 0.6s ease,
              fill 0.6s ease,
              stroke 0.6s ease;
}

/* SVG icons inside elements should also transition */
.site-header svg,
.hero-content svg,
.sidebar svg,
.tree-panel svg,
.viewer-panel svg,
.card svg,
.calendar-event svg,
.site-footer svg,
.theme-dropdown svg,
.theme-mobile-controls svg {
  transition: fill 0.6s ease, stroke 0.6s ease, color 0.6s ease;
}

/* Hero image fade transition */
.hero-image {
  transition: opacity 0.5s ease;
}

/* =========================
   DEFAULT THEME (Summer Day)
   ========================= */
:root {
  --color-bg: #f5f3ef;
  --color-surface: #ffffff;
  --color-text: #1a2e1a;
  --color-text-muted: #6b7b6b;
  --color-primary: #3d5c4a;
  --color-primary-hover: #2d4a3e;
  --color-primary-light: #e8f0e8;
  --color-border: #d8d4cc;
  --color-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --color-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --hero-overlay-start: rgba(26, 46, 26, 0.3);
  --hero-overlay-mid: rgba(26, 46, 26, 0.5);
  --hero-overlay-end: rgba(26, 46, 26, 0.7);
  --hero-text-shadow: 0 2px 12px rgba(0,0,0,0.3);
  --color-footer: #2d4a3e;
  --color-footer-text: #c8d4c8;
  --color-footer-text-muted: #a3b5a3;
  --footer-icon-bg: rgba(255,255,255,0.15);
  --color-white: #ffffff;
  --color-skeleton: #f0f0ec;
  --color-skeleton-shine: #e0ddd6;
  --icon-1-bg: #e8f0e8;
  --icon-1-text: #3d5c4a;
  --icon-2-bg: #fef3c7;
  --icon-2-text: #b45309;
  --icon-3-bg: #dbeafe;
  --icon-3-text: #1e40af;
  --color-error: #dc2626;
  --radius: 14px;
  --radius-sm: 10px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 64px;
}

/* =========================
   WINTER THEME — Day
   ========================= */
body[data-theme="winter"] {
  --color-bg: #f0f4f8;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-primary: #3b82f6;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-border: #d1e0ed;
  --color-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --color-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --hero-overlay-start: rgba(15, 30, 50, 0.3);
  --hero-overlay-mid: rgba(15, 30, 50, 0.5);
  --hero-overlay-end: rgba(15, 30, 50, 0.7);
  --hero-text-shadow: 0 2px 12px rgba(0,0,0,0.3);
  --color-footer: #1e3a5f;
  --color-footer-text: #93c5fd;
  --color-footer-text-muted: #60a5fa;
  --footer-icon-bg: rgba(255,255,255,0.15);
  --color-white: #ffffff;
  --color-skeleton: #e2e8f0;
  --color-skeleton-shine: #cbd5e1;
  --icon-1-bg: #dbeafe;
  --icon-1-text: #3b82f6;
  --icon-2-bg: #e0f2fe;
  --icon-2-text: #0369a1;
  --icon-3-bg: #f1f5f9;
  --icon-3-text: #475569;
  --color-error: #ef4444;
}

/* =========================
   WINTER THEME — Dark
   ========================= */
body[data-theme="winter"][data-mode="dark"] {
  --color-bg: #0c1829;
  --color-surface: #162a45;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-primary: #60a5fa;
  --color-primary-hover: #3b82f6;
  --color-primary-light: #1e3a5f;
  --color-border: #2d4a6f;
  --color-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  --color-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);
  --hero-overlay-start: rgba(5, 10, 20, 0.4);
  --hero-overlay-mid: rgba(5, 10, 20, 0.6);
  --hero-overlay-end: rgba(5, 10, 20, 0.8);
  --hero-text-shadow: 0 2px 12px rgba(0,0,0,0.5);
  --color-footer: #0a1525;
  --color-footer-text: #94a3b8;
  --color-footer-text-muted: #64748b;
  --footer-icon-bg: rgba(255,255,255,0.1);
  --color-white: #f0f9ff;
  --color-skeleton: #1e293b;
  --color-skeleton-shine: #0f172a;
  --icon-1-bg: #1e3a5f;
  --icon-1-text: #60a5fa;
  --icon-2-bg: #1e3a5f;
  --icon-2-text: #93c5fd;
  --icon-3-bg: #1e293b;
  --icon-3-text: #94a3b8;
  --color-error: #f87171;
}

/* =========================
   SPRING THEME — Day
   ========================= */
body[data-theme="spring"] {
  --color-bg: #faf7f5;
  --color-surface: #ffffff;
  --color-text: #2d4a32;
  --color-text-muted: #6b8e6b;
  --color-primary: #22c55e;
  --color-primary-hover: #16a34a;
  --color-primary-light: #dcfce7;
  --color-border: #d4e8d4;
  --color-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --color-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --hero-overlay-start: rgba(20, 45, 25, 0.3);
  --hero-overlay-mid: rgba(20, 45, 25, 0.5);
  --hero-overlay-end: rgba(20, 45, 25, 0.7);
  --hero-text-shadow: 0 2px 12px rgba(0,0,0,0.3);
  --color-footer: #2d4a32;
  --color-footer-text: #a3d9a3;
  --color-footer-text-muted: #86c788;
  --footer-icon-bg: rgba(255,255,255,0.15);
  --color-white: #ffffff;
  --color-skeleton: #f0fdf4;
  --color-skeleton-shine: #dcfce7;
  --icon-1-bg: #dcfce7;
  --icon-1-text: #16a34a;
  --icon-2-bg: #fef3c7;
  --icon-2-text: #b45309;
  --icon-3-bg: #fce7f3;
  --icon-3-text: #be185d;
  --color-error: #dc2626;
}

/* =========================
   SPRING THEME — Dark
   ========================= */
body[data-theme="spring"][data-mode="dark"] {
  --color-bg: #1a2e1a;
  --color-surface: #243d24;
  --color-text: #e8f5e9;
  --color-text-muted: #81c784;
  --color-primary: #4ade80;
  --color-primary-hover: #22c55e;
  --color-primary-light: #2d4a32;
  --color-border: #3a5c3a;
  --color-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  --color-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);
  --hero-overlay-start: rgba(10, 25, 10, 0.4);
  --hero-overlay-mid: rgba(10, 25, 10, 0.6);
  --hero-overlay-end: rgba(10, 25, 10, 0.8);
  --hero-text-shadow: 0 2px 12px rgba(0,0,0,0.5);
  --color-footer: #142414;
  --color-footer-text: #81c784;
  --color-footer-text-muted: #4caf50;
  --footer-icon-bg: rgba(255,255,255,0.1);
  --color-white: #e8f5e9;
  --color-skeleton: #1b2e1b;
  --color-skeleton-shine: #0f1f0f;
  --icon-1-bg: #2d4a32;
  --icon-1-text: #4ade80;
  --icon-2-bg: #3d4a1e;
  --icon-2-text: #d4d96e;
  --icon-3-bg: #3d1e2e;
  --icon-3-text: #f472b6;
  --color-error: #f87171;
}

/* =========================
   SUMMER THEME — Day
   ========================= */
body[data-theme="summer"] {
  --color-bg: #f5f3ef;
  --color-surface: #ffffff;
  --color-text: #1a2e1a;
  --color-text-muted: #6b7b6b;
  --color-primary: #3d5c4a;
  --color-primary-hover: #2d4a3e;
  --color-primary-light: #e8f0e8;
  --color-border: #d8d4cc;
  --color-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --color-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --hero-overlay-start: rgba(26, 46, 26, 0.3);
  --hero-overlay-mid: rgba(26, 46, 26, 0.5);
  --hero-overlay-end: rgba(26, 46, 26, 0.7);
  --hero-text-shadow: 0 2px 12px rgba(0,0,0,0.3);
  --color-footer: #2d4a3e;
  --color-footer-text: #c8d4c8;
  --color-footer-text-muted: #a3b5a3;
  --footer-icon-bg: rgba(255,255,255,0.15);
  --color-white: #ffffff;
  --color-skeleton: #f0f0ec;
  --color-skeleton-shine: #e0ddd6;
  --icon-1-bg: #e8f0e8;
  --icon-1-text: #3d5c4a;
  --icon-2-bg: #fef3c7;
  --icon-2-text: #b45309;
  --icon-3-bg: #dbeafe;
  --icon-3-text: #1e40af;
  --color-error: #dc2626;
}

/* =========================
   SUMMER THEME — Dark
   ========================= */
body[data-theme="summer"][data-mode="dark"] {
  --color-bg: #1a2520;
  --color-surface: #253630;
  --color-text: #e8f0e8;
  --color-text-muted: #8a9e8a;
  --color-primary: #6b9e7b;
  --color-primary-hover: #4d7a5d;
  --color-primary-light: #2d4a3e;
  --color-border: #3a4f3f;
  --color-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  --color-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);
  --hero-overlay-start: rgba(15, 25, 15, 0.4);
  --hero-overlay-mid: rgba(15, 25, 15, 0.6);
  --hero-overlay-end: rgba(15, 25, 15, 0.8);
  --hero-text-shadow: 0 2px 12px rgba(0,0,0,0.5);
  --color-footer: #14201a;
  --color-footer-text: #8a9e8a;
  --color-footer-text-muted: #5c7a5c;
  --footer-icon-bg: rgba(255,255,255,0.1);
  --color-white: #e0ece4;
  --color-skeleton: #1e2e28;
  --color-skeleton-shine: #0f1a15;
  --icon-1-bg: #2d4a3e;
  --icon-1-text: #6b9e7b;
  --icon-2-bg: #4a3d1e;
  --icon-2-text: #d4a96e;
  --icon-3-bg: #1e2e3a;
  --icon-3-text: #7a9ec7;
  --color-error: #f87171;
}

/* =========================
   AUTUMN THEME — Day
   ========================= */
body[data-theme="autumn"] {
  --color-bg: #faf3eb;
  --color-surface: #ffffff;
  --color-text: #4a2c1a;
  --color-text-muted: #8b6f47;
  --color-primary: #d97706;
  --color-primary-hover: #b45309;
  --color-primary-light: #fef3c7;
  --color-border: #e8d5c4;
  --color-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --color-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --hero-overlay-start: rgba(60, 35, 15, 0.3);
  --hero-overlay-mid: rgba(60, 35, 15, 0.5);
  --hero-overlay-end: rgba(60, 35, 15, 0.7);
  --hero-text-shadow: 0 2px 12px rgba(0,0,0,0.3);
  --color-footer: #4a2c1a;
  --color-footer-text: #d4a574;
  --color-footer-text-muted: #b08d6e;
  --footer-icon-bg: rgba(255,255,255,0.15);
  --color-white: #ffffff;
  --color-skeleton: #fef3c7;
  --color-skeleton-shine: #fde68a;
  --icon-1-bg: #fef3c7;
  --icon-1-text: #b45309;
  --icon-2-bg: #ffedd5;
  --icon-2-text: #c2410c;
  --icon-3-bg: #f3e8ff;
  --icon-3-text: #7c3aed;
  --color-error: #dc2626;
}

/* =========================
   AUTUMN THEME — Dark
   ========================= */
body[data-theme="autumn"][data-mode="dark"] {
  --color-bg: #2a1a0e;
  --color-surface: #3d2818;
  --color-text: #faf3eb;
  --color-text-muted: #b08d6e;
  --color-primary: #f59e0b;
  --color-primary-hover: #d97706;
  --color-primary-light: #4a2c1a;
  --color-border: #5c3d28;
  --color-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  --color-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);
  --hero-overlay-start: rgba(20, 10, 5, 0.4);
  --hero-overlay-mid: rgba(20, 10, 5, 0.6);
  --hero-overlay-end: rgba(20, 10, 5, 0.8);
  --hero-text-shadow: 0 2px 12px rgba(0,0,0,0.5);
  --color-footer: #1f1208;
  --color-footer-text: #b08d6e;
  --color-footer-text-muted: #8b6f47;
  --footer-icon-bg: rgba(255,255,255,0.1);
  --color-white: #faf3eb;
  --color-skeleton: #3d2818;
  --color-skeleton-shine: #2a1a0e;
  --icon-1-bg: #4a2c1a;
  --icon-1-text: #f59e0b;
  --icon-2-bg: #4a3d1e;
  --icon-2-text: #fcd34d;
  --icon-3-bg: #3d1e4a;
  --icon-3-text: #c4b5fd;
  --color-error: #f87171;
}

/* =========================
   VARIABLES — Sage Green Theme
========================= */
:root {
    --color-bg: var(--color-bg);
    --color-surface: var(--color-surface);
    --color-text: var(--color-text);
    --color-text-muted: var(--color-text-muted);
    --color-primary: var(--color-primary);
    --color-primary-hover: var(--color-primary-hover);
    --color-primary-light: var(--color-primary-light);
    --color-border: var(--color-border);
    --color-shadow: var(--color-shadow);
    --color-shadow-lg: var(--color-shadow-lg);
    --color-hero-overlay: var(--hero-overlay-mid);
    --color-footer: var(--color-primary-hover);
    --color-footer-text: var(--color-footer-text);
    --radius: 14px;
    --radius-sm: 10px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --header-height: 64px;
}

/* =========================
   RESET & BASE
========================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* =========================
   NAV HEADER
========================= */
.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 4px;
    height: var(--header-height);
}

/* Push theme dropdown to the far right */
.theme-dropdown {
    margin-left: auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-text);
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

.main-nav {
    display: flex;
    gap: 4px;
}

.nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--color-text);
    background: var(--color-bg);
}

.nav-link.active {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 101;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger {
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

.menu-toggle.open .hamburger {
    background: transparent;
}

.menu-toggle.open .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.menu-toggle.open .hamburger::after {
    transform: rotate(-45deg);
    top: 0;
}

/* =========================
   HERO BANNER
========================= */
.hero-banner {
    position: relative;
    width: 100%;
    height: 320px;
    overflow: hidden;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        180deg,
        var(--hero-overlay-start) 0%,
        var(--hero-overlay-mid) 60%,
        var(--hero-overlay-end) 100%
    );
}

.hero-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 40px 0 48px;
    color: var(--color-white);
}

.hero-title {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 3.2rem;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
    text-shadow: var(--hero-text-shadow);
}

.hero-subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    opacity: 0.9;
    text-shadow: 0 1px 4px var(--hero-text-shadow);
}

/* =========================
   CONTAINER
========================= */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* =========================
   MAIN CONTENT
========================= */
.page-content {
    flex: 1;
    padding-top: 0;
    padding-bottom: 60px;
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-content.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* =========================
   TWO COLUMN LAYOUT
========================= */
.two-col-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    grid-template-areas:
        "welcome sidebar"
        "cards   sidebar";
    gap: 32px;
    padding-top: 40px;
}

.two-col-layout.swap {
    grid-template-columns: 1fr 2fr;
    grid-template-areas:
        "sidebar viewer"
        "sidebar viewer";
}

.main-col-welcome { grid-area: welcome; }
.main-col-cards   { grid-area: cards; margin-bottom: 32px; }
.sidebar           { grid-area: sidebar; }

/* Protokoll swap layout areas */
.two-col-layout.swap .tree-panel   { grid-area: sidebar; }
.two-col-layout.swap .viewer-panel { grid-area: viewer; }

/* =========================
   TYPOGRAPHY
========================= */
.section-title {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
    color: var(--color-text);
}

.section-title::after {
    content: '';
    display: block;
    width: 48px;
    height: 3px;
    background: var(--color-primary);
    margin-top: 12px;
    border-radius: 2px;
}

.lead {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    max-width: 640px;
    line-height: 1.7;
    margin-bottom: 16px;
}

/* =========================
   CARDS
========================= */
.card {
    background: var(--color-surface);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--color-shadow);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}

.card:hover {
    box-shadow: var(--color-shadow-lg);
    transform: translateY(-3px);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.card-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 10px;
    margin-bottom: 14px;
    font-size: 1.3rem;
}

.card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--color-text);
}

.card p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    flex: 1;
}

.card-arrow {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 14px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    transition: var(--transition);
}

.card:hover .card-arrow {
    gap: 8px;
}

/* =========================
   SIDEBAR (Calendar / Tree)
========================= */
.sidebar {
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--color-shadow);
    padding: 28px;
    height: fit-content;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 4px;
}

.sidebar-header-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.sidebar-title {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-text);
}

.sidebar-subtitle {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    margin-left: 36px;
}

/* =========================
   CALENDAR EVENTS (Sidebar style)
========================= */
.calendar-event {
    display: flex;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.calendar-event:last-child {
    border-bottom: none;
}

.calendar-event:hover {
    transform: translateX(4px);
}

.calendar-event-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.calendar-event-icon.green {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.calendar-event-icon.amber {
    background: var(--icon-2-bg);
    color: var(--icon-2-text);
}

.calendar-event-icon.blue {
    background: var(--icon-3-bg);
    color: var(--icon-3-text);
}

.calendar-event-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
    margin-bottom: 6px;
}

.calendar-event-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.calendar-event-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.calendar-event-desc {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.calendar-empty {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    padding: 20px 0;
    text-align: center;
}

.calendar-skeleton {
    display: flex;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid var(--color-border);
}

.calendar-skeleton-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(90deg, var(--color-bg) 25%, var(--color-skeleton-shine) 50%, var(--color-bg) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    flex-shrink: 0;
}

.calendar-skeleton-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.calendar-skeleton-text .skeleton-line {
    height: 14px;
    background: linear-gradient(90deg, var(--color-bg) 25%, var(--color-skeleton-shine) 50%, var(--color-bg) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 6px;
}

.calendar-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

.calendar-more:hover {
    gap: 10px;
    color: var(--color-primary-hover);
}

/* =========================
   FOOTER
========================= */
.site-footer {
    background: var(--color-footer);
    color: var(--color-footer-text);
    padding: 32px 0;
    margin-top: auto;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-white);
}

.footer-logo-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--footer-icon-bg);
    border-radius: 8px;
    font-size: 0.9rem;
}

.footer-tagline {
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    color: var(--color-footer-text);
    opacity: 0.7;
    transition: var(--transition);
}

.footer-social a:hover {
    opacity: 1;
    color: var(--color-white);
}

/* =========================
   PROTOKOLL — FOLDER TREE + VIEWER
========================= */
.tree-panel {
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--color-shadow);
    padding: 24px;
    height: fit-content;
    min-height: 500px;
}

.tree-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
}

.tree-header-icon {
    color: var(--color-primary);
}

.tree-title {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text);
}

.tree-subtitle {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    margin-left: 34px;
}

.tree-list {
    list-style: none;
}

.tree-folder {
    margin-bottom: 4px;
}

.tree-folder-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 12px;
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    text-align: left;
}

.tree-folder-toggle:hover {
    background: var(--color-bg);
}

.tree-folder-toggle .chevron {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
    flex-shrink: 0;
    color: var(--color-text-muted);
}

.tree-folder-toggle.open .chevron {
    transform: rotate(90deg);
}

.tree-folder-toggle .folder-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.tree-folder-children {
    list-style: none;
    padding-left: 36px;
    display: none;
}

.tree-folder-children.open {
    display: block;
    animation: fadeIn 0.2s ease;
}

.tree-file {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 12px;
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    text-align: left;
}

.tree-file:hover {
    background: var(--color-primary-light);
    color: var(--color-primary-hover);
}

.tree-file.active {
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
}

.tree-file .file-icon {
    flex-shrink: 0;
    color: currentColor;
    opacity: 0.7;
}

/* Viewer panel */
.viewer-panel {
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--color-shadow);
    min-height: 600px;
    display: flex;
    flex-direction: column;
}

.viewer-meta {
    padding: 24px 28px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
}

.viewer-meta-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.viewer-meta-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--color-primary-light);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.viewer-meta-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.viewer-meta-details {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

.viewer-meta-details span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.viewer-meta-sep {
    color: var(--color-border);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
    flex-shrink: 0;
}

.download-btn:hover {
    background: var(--color-primary-hover);
}

.viewer-iframe-wrap {
    flex: 1;
    min-height: 500px;
    position: relative;
}

#pdfViewer {
    width: 100%;
    height: 100%;
    min-height: 500px;
    border: none;
    opacity: 0;
    transition: opacity 0.35s ease;
}

.viewer-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-text-muted);
    padding: 80px 20px;
    gap: 16px;
    min-height: 500px;
}

.viewer-placeholder-icon {
    opacity: 0.3;
}

/* =========================
   CONTACT PAGE
========================= */
.contact-email-card {
    background: var(--color-surface);
    padding: 20px 24px;
    border-radius: var(--radius);
    box-shadow: var(--color-shadow);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 420px;
    margin-top: 24px;
}

.contact-email-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-email-link {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

.contact-email-link:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

/* Board members */
.board-section {
    margin-top: 48px;
}

.board-members {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 14px;
    margin-top: 20px;
}

.board-member-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 20px 22px;
    box-shadow: var(--color-shadow);
    transition: var(--transition);
    animation: fadeInUp 0.4s ease both;
    position: relative;
    overflow: hidden;
}

.board-member-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--color-primary);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.board-member-card:hover {
    box-shadow: var(--color-shadow-lg);
    transform: translateY(-2px);
}

.board-member-card:hover::before {
    opacity: 1;
}

.board-member-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
    margin-bottom: 4px;
}

.board-member-post {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}

.board-member-contact {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.4;
    word-wrap: break-word;
}

.board-empty {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    padding: 20px 0;
    text-align: center;
    grid-column: 1 / -1;
}

/* =========================
   ANIMATIONS
========================= */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 900px) {
    .two-col-layout {
        grid-template-columns: 1fr;
        grid-template-areas:
            "welcome"
            "sidebar"
            "cards";
    }

    .two-col-layout.swap {
        grid-template-columns: 1fr;
        grid-template-areas:
            "sidebar"
            "viewer";
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-banner {
        height: 240px;
    }

    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 56px;
    }

    .container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-banner {
        height: 200px;
    }

    .menu-toggle {
        display: block;
        margin-left: auto;
    }

    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: 12px 24px 20px;
        gap: 4px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        box-shadow: var(--color-shadow-lg);
    }

    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-link {
        padding: 12px 16px;
        font-size: 1rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .viewer-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
}

/* =========================
   THEME DROPDOWN
   ========================= */

.theme-dropdown {
    position: relative;
    margin-left: auto;
}

.theme-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.theme-dropdown-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.theme-dropdown.open .theme-dropdown-toggle {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.theme-dropdown-chevron {
    transition: transform 0.2s ease;
}

.theme-dropdown.open .theme-dropdown-chevron {
    transform: rotate(180deg);
}

.theme-dropdown-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 180px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--color-shadow-lg);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 200;
}

.theme-dropdown.open .theme-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.theme-dropdown-group-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 6px 8px 4px;
}

.theme-dropdown-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
    padding: 2px 4px 4px;
}

.theme-dropdown-divider {
    height: 1px;
    background: var(--color-border);
    margin: 4px 8px;
}

.theme-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    color: var(--color-text);
    transition: all 0.15s ease;
    text-align: left;
}

.theme-dropdown-btn:hover {
    background: var(--color-bg);
    border-color: var(--color-border);
}

.theme-dropdown-btn.active {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
    font-weight: 600;
}

.theme-dropdown-btn--full {
    grid-column: 1 / -1;
    margin: 2px 4px 4px;
}

.theme-dropdown-btn--reset {
    grid-column: 1 / -1;
    margin: 2px 4px 4px;
    color: var(--color-text-muted);
    font-size: 0.8rem;
}

.theme-dropdown-btn--reset:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

/* Emoji styling for visibility in all themes */
.theme-dropdown-emoji {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    font-size: 1rem;
    line-height: 1;
    flex-shrink: 0;
    /* Text shadow for contrast on any background */
    text-shadow: 0 0 2px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.1);
    filter: drop-shadow(0 0 1px rgba(128, 128, 128, 0.3));
}

/* In dark mode, adjust the shadow direction for light emojis */
body[data-mode="dark"] .theme-dropdown-emoji {
    text-shadow: 0 0 2px rgba(255, 255, 255, 0.3), 0 0 4px rgba(255, 255, 255, 0.1);
}

.theme-dropdown-text {
    font-size: 0.85rem;
}

/* =========================
   THEME MOBILE CONTROLS (in hamburger menu)
   ========================= */

.theme-mobile-controls {
    display: none; /* Hidden on desktop */
}

@media (max-width: 768px) {
    .theme-dropdown {
        display: none !important; /* Hide desktop dropdown on mobile */
    }

    .theme-mobile-controls {
        display: block;
        padding-top: 12px;
    }

    .theme-mobile-divider {
        height: 1px;
        background: var(--color-border);
        margin-bottom: 10px;
    }

    .theme-mobile-label {
        display: block;
        font-size: 0.7rem;
        font-weight: 700;
        color: var(--color-text-muted);
        text-transform: uppercase;
        letter-spacing: 0.06em;
        margin-bottom: 8px;
        padding-left: 4px;
    }

    .theme-mobile-row {
        display: flex;
        gap: 6px;
        flex-wrap: wrap;
    }

    .theme-mobile-btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 12px;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-sm);
        background: var(--color-bg);
        color: var(--color-text);
        font-family: inherit;
        font-size: 0.85rem;
        font-weight: 500;
        cursor: pointer;
        transition: all 0.15s ease;
        flex: 1;
        justify-content: center;
    }

    .theme-mobile-btn:hover {
        border-color: var(--color-primary);
        background: var(--color-primary-light);
        color: var(--color-primary);
    }

    .theme-mobile-btn.active {
        background: var(--color-primary);
        border-color: var(--color-primary);
        color: var(--color-white);
        font-weight: 600;
    }

    .theme-mobile-btn--wide {
        flex: 2;
    }

    .theme-mobile-btn--reset {
        flex: 1;
        color: var(--color-text-muted);
        font-size: 0.8rem;
    }

    .theme-mobile-btn--reset:hover {
        color: var(--color-primary);
        background: var(--color-primary-light);
    }

    .theme-mobile-emoji {
        font-size: 1rem;
        line-height: 1;
        text-shadow: 0 0 2px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.1);
        filter: drop-shadow(0 0 1px rgba(128, 128, 128, 0.3));
    }

    body[data-mode="dark"] .theme-mobile-emoji {
        text-shadow: 0 0 2px rgba(255, 255, 255, 0.3), 0 0 4px rgba(255, 255, 255, 0.1);
    }
}

/* Touch optimizations */
@media (hover: none) {
    .card:hover,
    .board-member-card:hover,
    .calendar-event:hover {
        transform: none;
    }
}

/* =========================
   INFO — ACCORDION + SEARCH
========================= */
.info-page {
    max-width: 860px;
    margin: 0 auto;
}

.info-header {
    margin-bottom: 24px;
}

.info-lead {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.6;
    max-width: 640px;
    margin-bottom: 20px;
}

.info-search-wrap {
    position: relative;
    max-width: 420px;
}

.info-search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

.info-search {
    width: 100%;
    padding: 12px 16px 12px 42px;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.info-search:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.info-accordion {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.info-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--color-shadow);
    overflow: hidden;
    animation: fadeIn 0.3s ease backwards;
}

.info-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    padding: 16px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
    transition: var(--transition);
}

.info-toggle:hover {
    background: var(--color-bg);
}

.info-title {
    flex: 1;
}

.info-chevron {
    flex-shrink: 0;
    color: var(--color-primary);
    transition: transform 0.25s ease;
}

.info-item.open .info-chevron {
    transform: rotate(180deg);
}

.info-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.info-item.open .info-body {
    max-height: 1200px;
}

.info-body-inner {
    padding: 4px 20px 18px;
    border-top: 1px solid var(--color-border);
    margin: 0 20px;
    padding-left: 0;
    padding-right: 0;
}

.info-body-inner p {
    color: var(--color-text-muted);
    font-size: 0.93rem;
    line-height: 1.65;
    margin-bottom: 10px;
}

.info-body-inner p:last-child {
    margin-bottom: 0;
}

.info-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-primary);
    background: var(--color-primary-light);
    border-radius: 999px;
    padding: 3px 10px;
    margin-bottom: 10px;
}

.info-error {
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
}