/* Perplexity Design System Variables */
:root {
    --color-background: #ffffff;
    --color-surface: #f9fafb;
    --color-surface-hover: #f3f4f6;
    --color-border: #e5e7eb;
    --color-text-primary: #1f2937;
    --color-text-secondary: #6b7280;
    --color-accent: #20808d;
    --color-accent-hover: #1a6b76;
    --color-error: #ef4444;
    --color-success: #10b981;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    --season-gradient-start: rgba(32, 128, 141, 0.9);
    --season-gradient-end: rgba(26, 107, 118, 0.95);
}

/* Seasonal Theme Variables */
body[data-season="waterfall"] {
    --season-primary: #ffc0cb;
    --season-secondary: #98d8c8;
    --season-accent: #f7dc6f;
    --season-bg-overlay: rgba(255, 192, 203, 0.05);
    --season-bg-image: url('images/Waterfall image.png');
    --season-gradient-start: rgba(255, 192, 203, 0.85);
    --season-gradient-end: rgba(152, 216, 200, 0.9);
    --season-message-bg: rgba(255, 182, 193, 0.2);
    --season-message-border: rgba(255, 105, 180, 0.5);
    --season-message-text: #ffffff;
}

body[data-season="summer"] {
    --season-primary: #ffd700;
    --season-secondary: #87ceeb;
    --season-accent: #ff6b6b;
    --season-bg-overlay: rgba(255, 215, 0, 0.05);
    --season-bg-image: url('images/ocean.png');
    --season-gradient-start: rgba(255, 215, 0, 0.85);
    --season-gradient-end: rgba(255, 140, 0, 0.9);
    --season-message-bg: rgba(255, 200, 50, 0.2);
    --season-message-border: rgba(255, 140, 0, 0.5);
    --season-message-text: #ffffff;
}

body[data-season="fall"] {
    --season-primary: #d2691e;
    --season-secondary: #cd853f;
    --season-accent: #ff8c00;
    --season-bg-overlay: rgba(210, 105, 30, 0.05);
    --season-bg-image: url('images/field.png');
    --season-gradient-start: rgba(210, 105, 30, 0.85);
    --season-gradient-end: rgba(205, 133, 63, 0.9);
    --season-message-bg: rgba(205, 92, 30, 0.2);
    --season-message-border: rgba(139, 69, 19, 0.5);
    --season-message-text: #ffffff;
}

body[data-season="mountains"] {
    --season-primary: #e0f2fe;
    --season-secondary: #bae6fd;
    --season-accent: #7dd3fc;
    --season-bg-overlay: rgba(224, 242, 254, 0.05);
    --season-bg-image: url('images/Mountains image.png');
    --season-gradient-start: rgba(125, 211, 252, 0.85);
    --season-gradient-end: rgba(186, 230, 253, 0.9);
    --season-message-bg: rgba(135, 206, 235, 0.2);
    --season-message-border: rgba(70, 130, 180, 0.5);
    --season-message-text: #ffffff;
}

/* Splash Screen */
.splash-screen {
    position: fixed;
    inset: 0;
    z-index: 5000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: opacity 1s ease;
}

.splash-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.splash-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    animation: splashContentIn 1.2s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.splash-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    color: white;
    background: linear-gradient(135deg, var(--season-gradient-start, rgba(32, 128, 141, 0.9)), var(--season-gradient-end, rgba(26, 107, 118, 0.95)));
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2), 0 2px 8px rgba(255, 255, 255, 0.1) inset;
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transition: background 0.5s ease;
    max-width: 90vw;
    word-wrap: break-word;
}

.splash-heart {
    font-size: 3rem;
    animation: heartPulse 1.8s ease-in-out 0.6s infinite;
    animation-fill-mode: both;
}

@keyframes splashContentIn {
    from {
        opacity: 0;
        transform: scale(0.85);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes heartPulse {
    0%   { opacity: 0; transform: scale(0.8); }
    15%  { opacity: 1; transform: scale(1.15); }
    30%  { opacity: 1; transform: scale(1); }
    65%  { opacity: 1; transform: scale(1.1); }
    100% { opacity: 1; transform: scale(1); }
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Mobile-first approach: Disable all scrolling on html and body */
/* This prevents both vertical and horizontal scrolling on all devices */
html {
    overflow: hidden;
    height: 100%;
    width: 100%;
    position: fixed;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--color-background);
    color: var(--color-text-primary);
    /* Use fixed height/width instead of min-height to prevent overflow */
    height: 100%;
    width: 100%;
    /* Flexbox centers content both vertically and horizontally */
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    /* Disable scrolling in both directions */
    overflow: hidden;
    /* Prevent touch-based scrolling on mobile devices */
    overscroll-behavior: none;
    /* Prevent iOS Safari bounce effect */
    -webkit-overflow-scrolling: auto;
    transition: background-color var(--transition-slow);
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--season-bg-overlay, transparent);
    background-image: var(--season-bg-image);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 1;
    pointer-events: none;
    z-index: 0;
    transition: background var(--transition-slow);
}

/* Container */
/* Main container uses flexbox to center content within viewport */
/* No scrolling needed - everything fits within visible area */
.container {
    max-width: 100%;
    width: 100%;
    /* Use viewport height instead of min-height to fit exactly */
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile browsers */
    position: relative;
    z-index: 1;
    /* Flexbox centers all child elements vertically */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    /* Reduced padding to ensure content fits on small screens */
    padding: var(--spacing-md);
    padding-bottom: 80px;
    /* Prevent any overflow from this container */
    overflow: hidden;
}

/* Title */
/* Responsive title that scales down on smaller screens */
.title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    /* Remove top margin to better fit content in viewport */
    margin-top: 0;
    color: white;
    animation: fadeIn 0.8s ease;
    line-height: 1.3;
    background: linear-gradient(135deg, var(--season-gradient-start, rgba(32, 128, 141, 0.9)), var(--season-gradient-end, rgba(26, 107, 118, 0.95)));
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2), 0 2px 8px rgba(255, 255, 255, 0.1) inset;
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transition: background 0.5s ease;
    /* Ensure title doesn't overflow on narrow screens */
    max-width: 100%;
    word-wrap: break-word;
}

/* Settings Button - Alternative position */
.settings-btn-alt {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 10;
    background: transparent;
    border: none;
    padding: var(--spacing-sm);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.settings-btn-alt:hover {
    transform: scale(1.1);
}

.settings-btn-alt:active {
    transform: scale(0.95);
}

/* Icon Button Base */
.icon-btn {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: pointer;
    color: var(--color-text-primary);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--color-surface-hover);
    transform: scale(1.05);
}

.icon-btn:active {
    transform: scale(0.95);
}

/* Message Card */
/* Card adapts to available viewport space without causing overflow */
.message-card {
    background: var(--season-message-bg, var(--color-surface));
    border: 2px solid var(--season-message-border, var(--color-border));
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl) var(--spacing-2xl) var(--spacing-2xl) var(--spacing-2xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    /* Fixed height for consistent sizing */
    height: 82vh;
    /* Flexbox centers message text within card */
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    animation: fadeInUp 0.6s ease;
    margin-bottom: var(--spacing-lg);
    /* Ensure card fits within viewport width */
    width: 100%;
    max-width: 90vw;
    /* Allow internal scrolling only if message is extremely long */
    overflow: visible;
    transition: background-color 0.5s ease, border-color 0.5s ease, transform 0.5s ease, box-shadow 0.5s ease;
    transform: translateZ(20px);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.message-card .favorite-btn {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 10;
    background: transparent;
    border: none;
    padding: var(--spacing-sm);
}

/* Background-reveal button — centered at top of card */
.bg-btn {
    position: absolute;
    top: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    background: transparent;
    border: none;
    padding: var(--spacing-sm);
    color: var(--season-message-text, var(--color-text-primary));
    cursor: pointer;
    transition: all var(--transition-base);
}

.bg-btn:hover {
    transform: translateX(-50%) scale(1.1);
}

.bg-btn:active {
    transform: translateX(-50%) scale(0.95);
}

/* Background-only mode — fade out card and controls */
body.bg-mode .message-card,
body.bg-mode .controls {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.message-content {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.message-text {
    /* Fixed larger font size for better readability */
    font-size: 1.75rem;
    line-height: 1.6;
    text-align: center;
    margin: 0;
    padding: 0 var(--spacing-md);
    color: var(--season-message-text, var(--color-text-primary));
    animation: fadeIn 0.8s ease;
    font-style: italic;
    font-weight: 700;
    /* Ensure text wraps properly on small screens */
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-height: 100%;
    overflow-y: auto;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

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

/* Author Badge */
.author-badge {
    position: absolute;
    bottom: -2px;
    right: -2px;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md) 0 0 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
    animation: slideInRight 0.5s ease;
    z-index: 10;
    border: 2px solid;
    border-bottom: none;
    border-right: none;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Controls */
/* Mobile: fixed bottom bar without background; restored to static on desktop via media query */
.controls {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    justify-content: center;
    width: 100%;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    max-width: none;
    padding: var(--spacing-sm);
    padding-bottom: max(var(--spacing-sm), env(safe-area-inset-bottom, 0px));
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-top: none;
}

/* Mobile: next takes remaining space, rounded buttons */
.controls .btn-primary {
    flex: 1;
    border-radius: var(--radius-lg);
    padding: 1rem;
    font-size: 1.25rem;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-weight: 700;
}

/* Mobile: prev is a compact icon button, rounded */
.btn-prev {
    flex-shrink: 0;
    width: 60px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.25);
    color: white;
    border-radius: var(--radius-lg);
    padding: 1rem 0;
    opacity: 0.9;
    transition: background var(--transition-base), opacity var(--transition-base);
}

.btn-prev:hover {
    background: rgba(255, 255, 255, 0.25);
}

.btn-prev:disabled {
    opacity: 0.3;
    cursor: default;
}

.favorite-btn.active svg {
    fill: #ef4444;
    stroke: #ef4444;
}

.favorite-btn svg {
    transition: all var(--transition-base);
}

.favorite-btn:hover svg {
    transform: scale(1.1);
}

/* Button Styles */
.btn {
    padding: 1.25rem 2.5rem;
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
    flex: 1;
    max-width: 90vw;
}

.btn-primary {
    background: linear-gradient(135deg, var(--season-gradient-start, var(--color-accent)), var(--season-gradient-end, var(--color-accent)));
    color: white;
    transition: background 0.5s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
    background: linear-gradient(135deg, var(--season-gradient-start, var(--color-accent)), var(--season-gradient-end, var(--color-accent)));
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface-hover);
}

/* Settings Overlay */
/* Settings panel is also fixed and prevents background scrolling */
.settings-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    /* Flexbox centers settings panel */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
    /* Prevent scrolling when overlay is active */
    overflow: hidden;
}

.settings-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.settings-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    max-width: min(500px, 95vw);
    width: 100%;
    /* Settings panel can scroll internally if content is too long */
    max-height: 85vh;
    max-height: 85dvh; /* Dynamic viewport height for mobile */
    overflow-y: auto;
    /* Smooth scrolling for settings panel only */
    -webkit-overflow-scrolling: touch;
    transform: translateY(20px);
    transition: transform var(--transition-base);
}

.settings-overlay.active .settings-panel {
    transform: translateY(0);
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.settings-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
}

.settings-header-buttons {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.reset-btn {
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.reset-btn:hover {
    color: var(--color-text-primary);
    background: var(--color-surface-hover);
}

.settings-content {
    padding: var(--spacing-lg);
}

.settings-section {
    margin-bottom: var(--spacing-lg);
}

.settings-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.favorites-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.favorites-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--color-accent);
}

.favorites-checkbox label {
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Filter Group */
.filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.filter-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
    flex-shrink: 0;
}

.filter-checkbox:hover {
    background: var(--color-surface-hover);
}

.filter-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--color-accent);
}

.filter-checkbox label {
    cursor: pointer;
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.author-color-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-surface-hover);
    transition: var(--transition-base);
    border-radius: 34px;
    border: 1px solid var(--color-border);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 3px;
    background-color: var(--color-text-primary);
    transition: var(--transition-base);
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: var(--color-accent);
}

input:checked + .toggle-slider:before {
    transform: translateX(26px);
}

/* Season Selector */
.season-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-sm);
}

.season-btn {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--color-surface-hover);
    border: 2px solid transparent;
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 0.875rem;
}

.season-btn:hover {
    background: var(--color-border);
}

.season-btn.active {
    border-color: var(--color-accent);
    background: var(--color-accent);
}

/* Settings Footer */
.settings-footer {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.settings-footer .btn {
    flex: 1;
}

/* Seasonal Decorations */
/* Decorations stay within viewport bounds */
.seasonal-decorations {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
    /* Prevent decorations from causing overflow */
    overflow: hidden;
    width: 100%;
    height: 100%;
}

.decoration {
    position: absolute;
    font-size: 2.5rem;
    opacity: 0.7;
}

/* Fall-specific falling animation */
body[data-season="fall"] .decoration {
    animation: fall 10s linear infinite;
}

@keyframes fall {
    0% {
        transform: translateY(-10vh) rotate(0deg);
        opacity: 0.7;
    }
    100% {
        transform: translateY(110vh) rotate(360deg);
        opacity: 0;
    }
}

/* Spring/Summer/Winter float animation */
body[data-season="waterfall"] .decoration,
body[data-season="summer"] .decoration,
body[data-season="mountains"] .decoration {
    animation: float 10s infinite ease-in-out;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

.decoration:nth-child(2) {
    animation-delay: 2s;
    animation-duration: 12s;
}

.decoration:nth-child(3) {
    animation-delay: 4s;
    animation-duration: 14s;
}

.decoration:nth-child(4) {
    animation-delay: 6s;
    animation-duration: 16s;
}

.decoration:nth-child(5) {
    animation-delay: 8s;
    animation-duration: 18s;
}

.decoration:nth-child(6) {
    animation-delay: 1s;
    animation-duration: 11s;
}

.decoration:nth-child(7) {
    animation-delay: 3s;
    animation-duration: 13s;
}

.decoration:nth-child(8) {
    animation-delay: 5s;
    animation-duration: 15s;
}

/* Responsive Design */
/* Mobile-specific optimizations for small screens */
@media (max-width: 640px) {
    /* Further reduce title size on very small screens */
    .title {
        font-size: 1.75rem;
        padding: var(--spacing-md) var(--spacing-lg);
        margin-bottom: var(--spacing-md);
    }
    
    /* Smaller message text on mobile */
    .message-text {
        font-size: 1.5rem;
        line-height: 1.5;
        margin: 0;
        padding: 0 var(--spacing-sm);
        font-style: italic;
    }
    
    /* Compact message card for mobile */
    .message-card {
        padding: var(--spacing-xl);
        height: 78vh;
        margin-bottom: var(--spacing-md);
    }
    
    /* Reduced container padding on mobile to fill more space */
    .container {
        padding: var(--spacing-sm);
        padding-bottom: 80px;
    }
    
    /* Ensure buttons fit on mobile */
    .btn {
        padding: 1rem 2rem;
        font-size: 1.25rem;
    }
    
    /* Author badge on mobile */
    .author-badge {
        font-size: 1rem;
        padding: var(--spacing-sm) var(--spacing-lg);
        bottom: -2px;
        right: -2px;
    }
}

/* Tablet and larger screens */
@media (min-width: 641px) {
    .message-text {
        font-size: 2rem;
        font-style: italic;
    }

    .title {
        font-size: 2.5rem;
    }

    /* Restore controls to normal flow on desktop */
    .controls {
        position: static;
        max-width: min(520px, 90vw);
    }

    .controls .btn {
        border-radius: var(--radius-lg);
        width: auto;
    }

    .btn-prev {
        width: auto;
        padding-bottom: 1.25rem;
        background: var(--color-surface);
        color: var(--color-text-primary);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-lg);
        opacity: 1;
    }

    .btn-prev:hover {
        background: var(--color-surface-hover);
    }

    .container {
        padding-bottom: var(--spacing-md);
    }

    /* Center card horizontally on larger screens */
    .message-card {
        max-width: 85vw;
        height: 72vh;
    }
}

/* Desktop screens */
@media (min-width: 1024px) {
    .message-card {
        height: 78vh;
        max-width: 900px;
    }
    
    .message-text {
        font-size: 2.25rem;
        font-style: italic;
    }
    
    .title {
        font-size: 3rem;
    }
    
    .btn {
        font-size: 1.75rem;
    }
}

/* Landscape orientation on mobile devices */
/* Adjust layout for horizontal orientation */
@media (max-width: 900px) and (orientation: landscape) {
    .container {
        padding: var(--spacing-xs);
    }
    
    .title {
        font-size: 1.5rem;
        padding: var(--spacing-sm) var(--spacing-md);
        margin-bottom: var(--spacing-xs);
    }
    
    .message-card {
        padding: var(--spacing-md) var(--spacing-lg);
        height: 65vh;
    }
    
    .message-text {
        font-size: 1.25rem;
        margin: 0;
        padding: 0 var(--spacing-sm);
        font-style: italic;
    }
    
    .controls {
        margin-top: var(--spacing-xs);
    }
    
    .author-badge {
        font-size: 0.875rem;
        padding: var(--spacing-xs) var(--spacing-md);
        bottom: -2px;
        right: -2px;
    }
    
    .btn {
        font-size: 1.125rem;
        padding: var(--spacing-md) var(--spacing-xl);
    }
}