/* CSS for Medientagebuch */
:root {
    /* High-End SaaS Palette */
    --primary: #3b82f6;
    /* Electric Blue */
    --primary-hover: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;

    --bg-color: #f8fafc;
    /* Slate 50 */
    --surface-color: #ffffff;
    --text-main: #0f172a;
    /* Slate 900 */
    --text-muted: #64748b;
    /* Slate 500 */

    --input-bg: #ffffff;
    --input-border: #e2e8f0;
    /* Slate 200 */

    --radius-md: 12px;
    /* Slightly tighter */
    --radius-lg: 16px;

    /* Modern Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 0 4px rgba(59, 130, 246, 0.15);
    /* Focus Ring */

    /* Compatibility */
    --primary-color: var(--primary);
    --card-bg: rgba(255, 255, 255, 0.95);
    --settings-item-bg: #f8fafc;
}

[data-theme="dark"] {
    --primary: #60a5fa;
    --primary-hover: #3b82f6;
    --primary-dark: #3b82f6;

    --bg-color: #0f172a;
    /* Slate 900 */
    --surface-color: #1e293b;
    /* Slate 800 */
    --text-main: #f8fafc;
    /* Slate 50 */
    --text-muted: #cbd5e1;
    /* Slate 300 */

    --input-bg: #1e293b;
    --input-border: #334155;
    /* Slate 700 */
    --card-bg: rgba(30, 41, 59, 0.95);
    --settings-item-bg: rgba(255, 255, 255, 0.05);

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.5);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    -webkit-tap-highlight-color: transparent;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

/* FIX: Better contrast for text-muted in Dark Mode */
.text-muted {
    color: var(--text-muted) !important;
}

/* Subtle Gradient Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 15vh;
    background: linear-gradient(135deg, hsl(210, 80%, 96%) 0%, hsl(260, 60%, 97%) 100%);
    z-index: -1;
    border-bottom-left-radius: 50% 20px;
    border-bottom-right-radius: 50% 20px;
    transition: opacity 0.3s;
}

[data-theme="dark"] body::before {
    background: linear-gradient(135deg, #161b22 0%, #0b0e14 100%);
    opacity: 0.5;
}

.app-container {
    width: 100%;
    max-width: 480px;
    /* Mobile focused max-width */
    margin: 0 auto;
    flex-grow: 1;
    padding: 24px 20px;
    padding-bottom: 80px;
    /* Space for potentially fixed elements or safe area */
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Titles & Branding */
.branding-header {
    text-align: left;
    margin-bottom: 1.5rem;
    animation: fadeInDown 0.6s ease-out;
}

.branding-title {
    opacity: 0.7;
    color: var(--text-main);
    transition: color 0.3s, opacity 0.3sbox-shadow;
}

.branding-header h1 {
    font-weight: 700;
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-main), var(--primary-dark));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.branding-header p {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
}

.badge-study {
    background-color: #eef2ff;
    color: var(--primary-dark);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    display: inline-block;
}

/* Dark Mode Branding Fix */
[data-theme="dark"] .branding-title {
    color: #ffffff !important;
    opacity: 1 !important;
}

/* Cards */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.5s ease-out forwards;
}

/* Forms */
.form-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-main);
    margin-bottom: 0.5rem;
    display: block;
}

.form-control,
.form-select {
    border: 2px solid var(--input-border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    font-size: 1rem;
    font-weight: 500;
    background-color: var(--input-bg);
}

.settings-item-bg {
    background-color: var(--settings-item-bg);
}



.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    background-color: var(--input-bg);
    color: var(--text-main);
    transform: translateY(-1px);
}

/* Micro-Interactions */
button,
.btn {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

button:active,
.btn:active {
    transform: scale(0.96);
}

/* Modern Card */
.card,
.glass-card {
    border: 1px solid var(--input-border) !important;
    box-shadow: var(--shadow-sm) !important;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    box-shadow: var(--shadow-md) !important;
}

/* Buttons */
.btn-modern {
    background: var(--text-main);
    color: #fff;
    border: none;
    padding: 16px;
    border-radius: var(--radius-md);
    font-weight: 600;
    width: 100%;
    font-size: 1rem;
    letter-spacing: 0.3px;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
    position: relative;
    overflow: hidden;
}

.btn-modern:active {
    transform: scale(0.98);
}

.btn-primary-modern {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    box-shadow: 0 4px 15px rgba(13, 110, 253, 0.3);
}

.btn-primary-modern:hover {
    box-shadow: 0 6px 20px rgba(13, 110, 253, 0.4);
    transform: translateY(-1px);
}

.btn-start-study {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    color: white;
    border: none;
    font-weight: 600;
    letter-spacing: 0.01em;
    padding: 16px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.btn-start-study:hover {
    background: linear-gradient(135deg, #34D399 0%, #059669 100%);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-start-study:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px rgba(16, 185, 129, 0.4);
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}


/* File Upload */
.upload-area {
    border: 2px dashed var(--input-border);
    border-radius: var(--radius-lg);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--input-bg);
    position: relative;
    overflow: hidden;
}

.upload-area:active {
    background: #f0f2f5;
    border-color: #c1c9d2;
}

.upload-area.has-file {
    border-style: solid;
    border-color: transparent;
    padding: 0;
    background: black;
    height: 300px;
    /* Fixed height for preview */
    display: flex;
    align-items: center;
    justify-content: center;
}

/* --- Dark Mode Readability Fixes --- */
.text-muted {
    color: var(--text-muted) !important;
}

::placeholder {
    color: var(--text-muted) !important;
    opacity: 0.7;
}

/* Input / Select Fixes */
.form-control,
.form-select,
input,
select,
textarea {
    background-color: var(--input-bg) !important;
    color: var(--text-main) !important;
    border-color: var(--input-border);
}

/* Option readability in select dropdowns (Browser dependent, but safer) */
option {
    background-color: var(--input-bg);
    color: var(--text-main);
}

/* Card Text Override */
.card,
.glass-card {
    color: var(--text-main);
}

/* Links in Dark Mode */
a {
    color: var(--primary-color);
}

.upload-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    transition: transform 0.3s;
}

.upload-area:hover .upload-icon {
    transform: scale(1.1) rotate(5deg);
}

.upload-text-main {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--text-main);
}

.upload-text-sub {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Media Preview */
.media-preview {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.remove-file-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    z-index: 10;
}

/* Loaders & Animation */
.spinner-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(5px);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.spinner-wrapper.active {
    opacity: 1;
    pointer-events: all;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Helpers */
.hidden {
    display: none !important;
}

.user-pill {
    display: inline-flex;
    align-items: center;
    background: var(--card-bg);
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid var(--input-border);
    font-size: 0.85rem;
    color: var(--text-muted);
    box-shadow: var(--shadow-sm);
}

.user-pill strong {
    color: var(--text-main);
    margin-left: 4px;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--card-bg);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--input-border);
    backdrop-filter: blur(10px);
    color: var(--text-main);
    transition: all 0.3s;
}

/* PWA Modal */
#pwa-modal {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    max-width: 400px;
    margin: 0 auto;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: 20px;
    z-index: 2000;
    transform: translateY(150%);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--input-border);
    color: var(--text-main);
}

#pwa-modal.show {
    transform: translateY(0);
}

/* Existing Styles Adaptions */
.glass-card {
    background: var(--card-bg);
    border-color: rgba(255, 255, 255, 0.1);
}

.form-control,
.form-select {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-main);
}

.form-control:focus {
    background-color: var(--input-bg);
    color: var(--text-main);
}

/* Custom Confirmation Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.2s ease;
}

.modal-overlay.hidden {
    display: none;
}

.modal-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    max-width: 400px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
    border: 1px solid var(--input-border);
}

[data-theme="dark"] .modal-card {
    background-color: var(--card-bg) !important;
    color: var(--text-main) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
}

.modal-header-custom {
    padding: 20px 24px;
    border-bottom: 1px solid var(--input-border);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.modal-header-custom h5 {
    margin: 0;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.modal-body-custom {
    padding: 24px;
    color: var(--text-main);
}

.modal-body-custom p {
    margin: 0;
    line-height: 1.6;
}

.modal-footer-custom {
    padding: 16px 24px;
    border-top: 1px solid var(--input-border);
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    background: var(--bg-main);
}

.modal-footer-custom .btn {
    min-width: 100px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Custom Slider Visibility */
.form-range {
    height: 1.5rem;
    padding: 0;
}

/* Track (Bar) */
.form-range::-webkit-slider-runnable-track {
    background-color: #d0d7de;
    /* Darker gray for better contrast */
    border-radius: 10px;
    height: 8px;
}

/* Thumb (Handle) */
.form-range::-webkit-slider-thumb {
    background-color: var(--primary-color);
    border: 3px solid var(--bg-color);
    /* Separator ring */
    width: 24px;
    height: 24px;
    margin-top: -8px;
    /* Center thumb on track (8px track / 2 - 24px thumb / 2) */
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: transform 0.1s;
}

.form-range:active::-webkit-slider-thumb {
    transform: scale(1.2);
}

/* Dark Mode Adjustments for Slider */
[data-theme="dark"] .form-range::-webkit-slider-runnable-track {
    background-color: #3d444d;
    /* Visible dark track */
}

[data-theme="dark"] .form-range::-webkit-slider-thumb {
    border-color: var(--card-bg);
}

/* Modern Segmented Toggle */
.nav-segment {
    background: var(--input-bg);
    padding: 4px;
    border-radius: 12px;
    display: inline-flex;
    position: relative;
    border: 1px solid var(--input-border);
    width: 100%;
}

.nav-segment button {
    flex: 1;
    border: none;
    background: transparent;
    z-index: 2;
    padding: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: 8px;
    transition: color 0.3s;
}

.nav-segment button.active {
    color: var(--primary-color);
}

.nav-indicator {
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 4px;
    width: calc(50% - 4px);
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1;
}

[data-theme="dark"] .nav-indicator {
    background: #2d2d2d;
}

/* Active Segment Class (Replaces bg-white in JS) */
.active-segment {
    background-color: var(--card-bg) !important;
    color: var(--primary-color) !important;
    box-shadow: var(--shadow-sm);
}

/* Dark Mode "State of the Art" Glows & Borders */
[data-theme="dark"] .glass-card,
[data-theme="dark"] .card,
[data-theme="dark"] .user-pill,
[data-theme="dark"] .nav-segment,
[data-theme="dark"] .form-control {
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4) !important;
    background-color: var(--card-bg) !important;
}

[data-theme="dark"] .active-segment {
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    background-color: rgba(255, 255, 255, 0.1) !important;
    color: white !important;
}

/* History Item Styling */
.history-badge,
.history-note {
    background-color: #f8f9fa;
    /* Light mode default (bg-light) */
    color: #212529;
    /* Light mode default (text-dark) */
}

[data-theme="dark"] .history-badge,
[data-theme="dark"] .history-note {
    background-color: rgba(255, 255, 255, 0.1) !important;
    color: #e2e8f0 !important;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.history-textarea {
    color: inherit;
}

[data-theme="dark"] .history-textarea {
    color: #fff !important;
}
/* Text labels and emojis need different space; legacy study markup is unchanged. */
.mood-choices { display:flex; flex-wrap:wrap; gap:.65rem; align-items:stretch; }
.mood-choices .mood-btn { min-height:48px; border:1px solid #b8c3d1; border-radius:12px; padding:.75rem 1rem; font-size:1rem; line-height:1.4; white-space:normal; overflow-wrap:anywhere; box-shadow:none; }
.mood-choices-text .mood-btn { flex:1 1 8rem; min-width:0; }
.mood-choices-emoji .mood-btn { min-width:56px; font-size:1.75rem; padding:.4rem .7rem; }
.mood-choices .mood-btn[aria-pressed="true"] { border-color:#0757ca; outline:2px solid #0757ca; outline-offset:2px; }
.mood-choices .mood-btn:focus-visible { outline:3px solid #111827; outline-offset:3px; }

/* Responsive participant layout; protected legacy study keeps its existing layout. */
.participant-responsive .app-container { overflow-wrap: anywhere; }
.participant-responsive .app-container input:not([type=checkbox]):not([type=radio]),
.participant-responsive .app-container select,
.participant-responsive .app-container textarea { min-width: 0; max-width: 100%; font-size: 1rem; }
.participant-responsive .app-container button:focus-visible,
.participant-responsive .app-container a:focus-visible { outline: 3px solid var(--primary-dark); outline-offset: 3px; }
@media (min-width: 768px) {
    .participant-responsive .app-container { max-width: 720px; padding-left: 32px; padding-right: 32px; }
}
@media (max-width: 480px) {
    .participant-responsive .mood-choices-text { flex-direction: column; }
    .participant-responsive .mood-choices-text .mood-btn { flex: none; width: 100%; min-height: 48px; }
}