/**
 * AVANT-GARDE UI & INTENTIONAL MINIMALISM
 * Core Design System Definitions
 */

:root {
    /* Color Palette - OLED Black & Tailored HSL Accents */
    --bg-base: #050505;
    --bg-surface: #0a0a0c;
    --bg-surface-hover: #111115;

    --text-primary: #fcfcfc;
    --text-secondary: #a0a0a5;
    --text-muted: #8a8a92;

    --accent-primary: hsl(255, 85%, 65%);
    --accent-primary-glow: hsla(255, 85%, 65%, 0.15);

    --accent-cyan: hsl(180, 100%, 40%);
    --accent-cyan-glow: hsla(180, 100%, 40%, 0.15);

    --danger: hsl(350, 80%, 60%);
    --success: hsl(150, 70%, 50%);
    --warning: hsl(40, 90%, 60%);

    /* Legacy aliases (eski stil dosyalarıyla uyumluluk) */
    --primary: var(--accent-primary);
    --bg-darker: var(--bg-surface);
    --bg-primary: var(--bg-base);
    --bg-secondary: var(--bg-surface);

    /* Bölüm kartı ikon renkleri (tek kaynak) */
    --section-notes-icon: var(--accent-cyan);
    --section-materials-icon: var(--accent-primary);
    --section-flashcards-icon: hsl(330, 80%, 70%);
    --section-quiz-icon: hsl(217, 90%, 68%);
    --section-video-icon: var(--warning);
    --section-podcast-icon: var(--success);

    /* Typography */
    --font-sans: 'Outfit', system-ui, -apple-system, sans-serif;

    /* Spacing - Compacted for mobile & dense UI */
    --space-xs: 0.15rem;
    --space-sm: 0.35rem;
    --space-md: 0.75rem;
    --space-lg: 1.25rem;
    --space-xl: 2rem;
    --space-2xl: 4rem;

    /* Legacy spacing aliases */
    --spacing-xs: var(--space-xs);
    --spacing-sm: var(--space-sm);
    --spacing-md: var(--space-md);
    --spacing-lg: var(--space-lg);
    --spacing-xl: var(--space-xl);
    --spacing-2xl: var(--space-2xl);
    --spacing-3xl: calc(var(--space-2xl) + 1rem);

    /* Radii */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions - Re-engineered for Avant-Garde Smoothness */
    --transition-spring: 0.6s cubic-bezier(0.25, 1, 0.5, 1);
    --transition-smooth: 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    --transition-fast: 0.25s cubic-bezier(0.3, 0.8, 0.2, 1);
}

/* Base Adjustments */
* {
    -webkit-tap-highlight-color: transparent;
}

body.private-theme {
    background: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    padding-top: env(titlebar-area-height, 0px);
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.22) rgba(255, 255, 255, 0.04);
}

body.private-theme *::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

body.private-theme *::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 4px;
}

body.private-theme *::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.18);
    border-radius: 4px;
}

body.private-theme *::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.28);
}

/* Ambient Contextual Glow when a course is selected */
body.private-theme[style*="--course-theme"] {
    background: radial-gradient(circle at 50% -20%, color-mix(in srgb, var(--course-theme) 12%, transparent) 0%, var(--bg-base) 70%), var(--bg-base);
    background-attachment: fixed;
    background-repeat: no-repeat;
}

/* ==========================================================================
   VIEW TRANSITIONS API (SPA FEEL)
   ========================================================================== */
@view-transition {
    navigation: auto;
}

::view-transition-old(root),
::view-transition-new(root) {
    animation-duration: 0.4s;
    animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
    animation-fill-mode: both;
}

/* Animate out - Fade out and slide back */
::view-transition-old(root) {
    animation-name: fade-out, slide-to-back;
}

/* Animate in - Fade in and slide forward */
::view-transition-new(root) {
    animation-name: fade-in, slide-from-front;
}

@keyframes fade-in {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fade-out {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}

@keyframes slide-from-front {
    from {
        transform: translateY(20px) scale(0.98);
    }

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

@keyframes slide-to-back {
    from {
        transform: translateY(0) scale(1);
    }

    to {
        transform: translateY(-20px) scale(0.98);
    }
}

/* Typography Overrides - Intentional Minimalism Scale */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    letter-spacing: -0.05em;
    /* Tighter for display feel */
    line-height: 1.05;
    margin: 0;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 5rem);
}

h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h3 {
    font-size: clamp(1.5rem, 3.5vw, 2.25rem);
    letter-spacing: -0.03em;
}

p {
    line-height: 1.7;
    letter-spacing: 0.01em;
}

/* Ana sayfa ders kartları: mobil ve masaüstünde her zaman ikişerli */
.courses-grid-avant {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    max-width: 100%;
}

/* Hafta içi bölüm kartları (Notlar, Materyaller, Kartlar, Quiz, Video, Podcast): masaüstünde auto, yalnızca mobilde ikişerli */
.courses-grid-avant.courses-grid-sections {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

@media (max-width: 768px) {
    .courses-grid-avant.courses-grid-sections {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }

    .card-avant.course-section-card {
        min-height: 148px;
        padding: var(--space-lg);
    }
}

/* The Card - Glassmorphism & Border, kart içi ferah */
.card-avant {
    background: rgba(255, 255, 255, 0.015);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    position: relative;
    cursor: pointer;
    transition: transform var(--transition-spring), border-color var(--transition-smooth), background var(--transition-smooth), box-shadow var(--transition-smooth);
    display: flex;
    flex-direction: column;
    will-change: transform, border-color, box-shadow;
    transform: translateZ(0);
    min-height: 180px;
    content-visibility: auto;
    contain-intrinsic-size: auto 200px;
    contain: layout style;
}

.card-avant::before {
    content: '';
    position: absolute;
    inset: -6px;
    background: var(--bg-surface-hover);
    border-radius: calc(var(--radius-xl) + 4px);
    opacity: 0;
    transform: scale(0.98);
    transition: all var(--transition-spring);
    z-index: 0;
}

.card-avant:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.04);
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.5), 0 0 40px -8px color-mix(in srgb, var(--card-color, var(--course-theme, #ffffff)) 25%, transparent);
    transform: translateY(-4px) scale(1.01);
}

.card-avant:hover::before {
    opacity: 1;
    transform: scale(1);
}

.card-avant>* {
    position: relative;
    z-index: 1;
}

.card-avant-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
    transition: color var(--transition-fast), transform var(--transition-spring);
}

.card-avant:hover .card-avant-icon {
    color: var(--text-primary);
    transform: translateY(-4px);
}

.card-avant-code {
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
}

.card-avant-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.card-avant-meta {
    font-size: 0.9rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: auto;
    padding-top: var(--space-md);
}

/* Ana sayfa ders kartları – sade, sol renk yok */
.card-avant.course-card-main {
    min-height: 160px;
    padding: var(--space-lg) var(--space-xl);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
}

.card-avant.course-card-main:hover {
    box-shadow: 0 8px 28px -6px rgba(0, 0, 0, 0.3), 0 0 20px -4px color-mix(in srgb, var(--card-color, var(--accent-primary)) 12%, transparent);
}

.card-avant.course-card-main .card-avant-icon {
    font-size: 2rem;
    opacity: 0.9;
}

.card-avant.course-card-main .card-avant-code {
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    margin-bottom: var(--space-xs);
}

.card-avant.course-card-main .card-avant-title {
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.35;
    letter-spacing: -0.01em;
}

.card-avant.course-card-main .card-avant-meta {
    font-size: 0.8125rem;
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    margin-top: var(--space-sm);
}

/* Bölüm kartları (ikon + başlık) tam ortada — hub’da tek tip yüzey */
.card-avant.course-section-card {
    justify-content: center;
    align-items: center;
    text-align: center;
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    padding: 2rem;
    min-height: 168px;
}

.card-avant.course-section-card .card-avant-icon {
    margin-bottom: var(--space-md);
    background: none !important;
    -webkit-background-clip: unset !important;
    background-clip: unset !important;
    -webkit-text-fill-color: currentColor !important;
}

.card-avant.course-section-card[data-section="notes"] .card-avant-icon {
    color: var(--section-notes-icon);
}

.card-avant.course-section-card[data-section="materials"] .card-avant-icon {
    color: var(--section-materials-icon);
}

.card-avant.course-section-card[data-section="flashcards"] .card-avant-icon {
    color: var(--section-flashcards-icon);
}

.card-avant.course-section-card[data-section="tests"] .card-avant-icon {
    color: var(--section-quiz-icon);
}

.card-avant.course-section-card[data-section="video-summaries"] .card-avant-icon {
    color: var(--section-video-icon);
}

.card-avant.course-section-card[data-section="audio-summaries"] .card-avant-icon {
    color: var(--section-podcast-icon);
}

.card-avant.course-section-card .card-avant-title {
    margin-bottom: 0;
    font-size: 1.25rem;
}

.card-avant.course-section-card .section-badge-avant {
    font-size: 0.7rem;
    padding: 3px 8px;
}

.card-avant.course-section-card .section-badge-avant--corner {
    position: absolute;
    top: 0.65rem;
    right: 0.65rem;
}

.card-avant.course-section-card.empty-card {
    border-style: dashed;
    border-color: rgba(255, 255, 255, 0.12);
    opacity: 0.92;
}

.card-avant.course-section-card.empty-card .card-empty-hint {
    display: block;
    margin-top: var(--space-sm);
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.02em;
}

.card-avant.course-section-card:not(.empty-card) .card-empty-hint {
    display: none;
}

.card-avant.course-section-card:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--accent-primary) 75%, white);
    outline-offset: 3px;
}

.card-avant.course-card-main:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--card-color, var(--accent-primary)) 70%, white);
    outline-offset: 3px;
}

.btn-avant:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--accent-primary) 75%, white);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

@media (max-width: 768px) {
    .btn-avant {
        min-height: 44px;
        padding: var(--space-sm) var(--space-md);
        align-self: flex-start;
    }
}

/* AJAX bölüm içeriği iskeleti */
#section-loading.section-content-skeleton-wrap {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: linear-gradient(180deg, var(--bg-surface) 0%, rgba(10, 10, 12, 0.97) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.section-content-skeleton-line {
    height: 14px;
    border-radius: var(--radius-sm);
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.06) 0%,
        rgba(255, 255, 255, 0.12) 50%,
        rgba(255, 255, 255, 0.06) 100%
    );
    background-size: 200% 100%;
    animation: section-skeleton-shimmer 1.2s ease-in-out infinite;
}

.section-content-skeleton-line.short {
    width: 55%;
}

.section-content-skeleton-line.title {
    height: 22px;
    width: 40%;
    margin-bottom: var(--space-sm);
}

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

.section-content-skeleton-caption {
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.section-content-skeleton-caption i {
    color: var(--accent-primary);
}

/* Header Sections - başlık ve alt yazı sola yaslı */
.avant-header {
    padding: var(--space-xl) 0 var(--space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: var(--space-lg);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.avant-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-top: var(--space-md);
    max-width: 600px;
}

/* Nav Actions */
.btn-avant {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.btn-avant:hover {
    color: var(--text-primary);
}

.btn-avant i {
    transition: transform var(--transition-spring);
}

.btn-avant:hover i {
    transform: translateX(-4px);
}

/* Sections Grid - hafta listesi */
.sections-grid-avant {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-width: 100%;
}

.section-row-avant {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-smooth);
    border: 1px solid transparent;
    content-visibility: auto;
    contain-intrinsic-size: auto 72px;
    contain: layout style;
}

.section-row-avant:hover {
    background: var(--bg-surface-hover);
    transform: translateX(10px);
    border-color: rgba(255, 255, 255, 0.05);
}

.section-row-avant.week-row-nav:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--accent-primary) 75%, white);
    outline-offset: 2px;
}

.section-row-avant h2,
.section-row-avant h3 {
    font-size: 1.4rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.section-row-avant .section-badge-avant {
    font-size: 0.8125rem;
}

.section-row-avant i {
    color: var(--accent-primary);
    opacity: 0.8;
}

.section-badge-avant {
    background: rgba(255, 255, 255, 0.03);
    color: var(--badge-color, var(--text-primary));
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-weight: 700;
    letter-spacing: 0.05em;
    border: 1px solid color-mix(in srgb, var(--badge-color, #ffffff) 20%, transparent);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 0 10px color-mix(in srgb, var(--badge-color, #ffffff) 10%, transparent);
}

.section-badge-avant::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 8px currentColor;
}

/* ==========================================================================
   COMMAND PALETTE (FUZZY SEARCH)
   ========================================================================== */
.cmd-palette-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 9999;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

.cmd-palette-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

.cmd-palette-container {
    background: var(--bg-surface);
    width: 90%;
    max-width: 650px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    overflow: hidden;
    transform: scale(0.98) translateY(-10px);
    transition: transform var(--transition-spring);
}

.cmd-palette-overlay.visible .cmd-palette-container {
    transform: scale(1) translateY(0);
}

.cmd-palette-header {
    display: flex;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(255, 255, 255, 0.02);
}

.cmd-palette-header i {
    color: var(--text-muted);
    font-size: 1.25rem;
    margin-right: var(--space-md);
}

.cmd-keyboard-hint {
    background: var(--bg-surface-hover);
    color: var(--text-muted);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

#cmd-palette-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-family: var(--font-sans);
    outline: none;
}

#cmd-palette-input::placeholder {
    color: var(--text-muted);
}

#cmd-palette-input:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--accent-primary) 70%, white);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.cmd-palette-item:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--accent-primary) 65%, white);
    outline-offset: -2px;
}

.cmd-palette-results {
    max-height: 400px;
    overflow-y: auto;
    padding: var(--space-sm);
}

.cmd-palette-item {
    display: flex;
    align-items: center;
    padding: var(--space-md);
    margin-bottom: 4px;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: background var(--transition-fast);
}

.cmd-palette-item:last-child {
    margin-bottom: 0;
}

.cmd-palette-item:hover {
    background: var(--bg-surface-hover);
}

.cmd-palette-item .icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--space-md);
    font-size: 1.2rem;
}

.cmd-palette-item .details {
    flex: 1;
}

.cmd-palette-item .title {
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 2px;
}

.cmd-palette-item .code {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.cmd-palette-item .arrow {
    color: var(--text-muted);
    opacity: 0;
    transform: translateX(-10px);
    transition: all var(--transition-spring);
}

.cmd-palette-item:hover .arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ==========================================================================
   MATERIALS VIEWER MODAL (IFRAME)
   ========================================================================== */
.mat-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

.mat-modal-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

.mat-modal-container {
    background: var(--bg-surface);
    width: 95%;
    max-width: 1200px;
    height: 90vh;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: scale(0.98) translateY(20px);
    transition: transform var(--transition-spring);
}

.mat-modal-overlay.visible .mat-modal-container {
    transform: scale(1) translateY(0);
}

.mat-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mat-modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.mat-modal-actions {
    display: flex;
    gap: 10px;
}

.mat-btn-icon {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.mat-btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.mat-btn-close {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.mat-btn-close:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.mat-modal-body {
    flex: 1;
    min-height: 0;
    background: #ffffff;
    /* White bg for documents */
    position: relative;
}

/* PDF yeni sekmede açıldı mesajı — mobilde .btn-avant align-self:flex-start kaçmasın */
.mat-pdf-fallback {
    position: absolute;
    inset: 0;
    z-index: 5;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    background: var(--bg-surface);
    color: var(--text-primary);
    text-align: center;
    gap: 15px;
    padding: 20px;
}

.mat-pdf-fallback__icon {
    font-size: 3rem;
    color: var(--accent-primary);
    line-height: 1;
}

.mat-pdf-fallback__lead {
    font-size: 1.2rem;
    margin: 0;
    max-width: 24rem;
}

.mat-pdf-fallback__hint {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    max-width: 24rem;
}

.mat-pdf-fallback__open {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 4px;
    padding: 10px 20px;
    min-height: 44px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    box-sizing: border-box;
    align-self: center;
}

.mat-pdf-fallback__open:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

.mat-iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.mat-loader {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-surface);
    color: var(--text-muted);
    z-index: 10;
    pointer-events: none;
    transition: opacity 0.5s;
}

.mat-loader i {
    font-size: 2rem;
    margin-bottom: 15px;
    animation: spin 1.5s linear infinite;
    color: var(--accent-primary);
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}