* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Modern Color Palette - 2024 */
    --primary-color: #6366F1;
    --primary-hover: #4F46E5;
    --primary-light: #E0E7FF;
    --accent-color: #F59E0B;
    --accent-hover: #D97706;
    --success-color: #10B981;
    --success-light: #D1FAE5;
    --danger-color: #EF4444;
    --danger-light: #FEE2E2;
    --warning-color: #F59E0B;
    --warning-light: #FEF3C7;

    /* Background & Surfaces */
    --background: #F8FAFC;
    --background-alt: #F1F5F9;
    --surface: #FFFFFF;
    --surface-elevated: #FFFFFF;
    --glass-bg: rgba(255, 255, 255, 0.8);

    /* Text Colors */
    --text-primary: #0F172A;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --text-inverse: #FFFFFF;

    /* Borders & Dividers */
    --border: #E2E8F0;
    --border-light: #F1F5F9;
    --border-focus: #6366F1;

    /* Shadows & Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-floating: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    --gradient-accent: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
    --gradient-surface: linear-gradient(135deg, #FFFFFF 0%, #F8FAFC 100%);

    /* Border Radius */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Transitions */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Inter', sans-serif;
    background: var(--gradient-surface);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Better tap interactions on mobile */
    -webkit-tap-highlight-color: transparent;
    /* Support for safe areas (iPhone notch) */
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
    position: relative;
}

.header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
}

.hidden {
    display: none !important;
}

.loading {
    text-align: center;
    color: var(--text-secondary);
    padding: var(--spacing-lg);
    font-style: italic;
}

/* App Grid */
.app-selection h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    text-align: center;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.app-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.app-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.app-card:hover::before {
    transform: scaleX(1);
}

.app-card h3 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

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

/* View Header */
.view-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.view-header h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.back-btn {
    background: var(--surface);
    border: 2px solid var(--border);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.back-btn::before {
    content: '←';
    font-size: 1.2rem;
}

.back-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-inverse);
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.back-btn:active {
    transform: translateY(0) scale(1);
}

/* Buttons */
.primary-btn, .secondary-btn {
    padding: var(--spacing) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.025em;
}

.primary-btn {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.primary-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: var(--transition);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    filter: brightness(1.05);
}

.primary-btn:hover::before {
    left: 100%;
}

.primary-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow);
}

.primary-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    filter: none;
}

.primary-btn:disabled::before {
    display: none;
}

.secondary-btn {
    background: var(--surface);
    color: var(--text-secondary);
    border: 2px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.secondary-btn:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-floating);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    z-index: 1000;
}

.fab:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: var(--shadow-floating);
    filter: brightness(1.1);
}

.fab:active {
    transform: translateY(-1px) scale(1.05);
}

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

/* Suggestions */
.suggestions-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.suggestion-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.suggestion-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transition: var(--transition);
    transform-origin: bottom;
}

.suggestion-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--primary-light);
}

.suggestion-card:hover::before {
    transform: scaleY(1);
}

.suggestion-header {
    display: flex;
    justify-content: between;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.suggestion-content {
    flex: 1;
}

.suggestion-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
}

.suggestion-description {
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

.suggestion-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.vote-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.vote-count {
    font-weight: 600;
    color: var(--primary-color);
}

.vote-btn {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border: none;
    padding: var(--spacing) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    min-width: 100px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.vote-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-lg);
}

.vote-btn:active {
    transform: translateY(0) scale(1);
}

.vote-btn:disabled {
    background: var(--border-light);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    filter: none;
}

.vote-btn.voted {
    background: var(--success-color);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    position: relative;
    color: var(--text-inverse) !important;
}

/* Hover overlay for normal vote buttons */
.vote-btn:not(.voted):not(:disabled):hover::after {
    content: '✓';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--success-color);
    border-radius: var(--radius-full);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    z-index: 2;
    animation: circleAppear 0.2s ease-out;
}

/* Hover overlay for voted buttons */
.vote-btn.voted:hover::after {
    content: '✕';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--danger-color);
    border-radius: var(--radius-full);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    z-index: 2;
    animation: circleAppear 0.2s ease-out;
}

@keyframes circleAppear {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Form */
.suggestion-form {
    max-width: 700px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-xl);
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing);
    font-size: 1.1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-lg);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    background: var(--surface);
    color: var(--text-primary);
    transition: var(--transition);
    resize: vertical;
    box-shadow: var(--shadow-sm);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--primary-light);
    transform: translateY(-1px);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
}

/* Toast Notifications */
.toast {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-small);
    box-shadow: var(--shadow-hover);
    color: var(--text-primary);
    font-weight: 500;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 1000;
    max-width: 400px;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

/* Success Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: var(--spacing-lg);
    animation: fadeIn 0.3s ease;
}

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

.overlay-content {
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-3xl);
    max-width: 500px;
    width: 100%;
    box-shadow: var(--shadow-floating);
    text-align: center;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.overlay-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    margin: 0 auto 24px auto;
    animation: scaleIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes scaleIn {
    from {
        transform: scale(0);
    }
    to {
        transform: scale(1);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    .header {
        margin-bottom: var(--spacing-xl);
        padding: var(--spacing-lg) 0;
    }

    .header h1 {
        font-size: 2rem;
    }

    .header p {
        font-size: 1rem;
    }

    .app-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .app-card {
        padding: var(--spacing-lg);
    }

    .app-card h3 {
        font-size: 1.25rem;
    }

    .app-card p {
        font-size: 0.9375rem;
    }

    .view-header {
        margin-bottom: var(--spacing-md);
        gap: var(--spacing);
    }

    .view-header h2 {
        font-size: 1.5rem;
    }

    .back-btn {
        width: 40px;
        height: 40px;
        flex-shrink: 0;
    }

    .suggestion-card {
        padding: var(--spacing-lg);
    }

    .suggestion-title {
        font-size: 1rem;
    }

    .suggestion-description {
        font-size: 0.9375rem;
    }

    .form-actions {
        flex-direction: column-reverse;
        gap: var(--spacing);
    }

    .form-actions .primary-btn,
    .form-actions .secondary-btn {
        width: 100%;
        padding: var(--spacing-md);
    }

    .suggestion-footer {
        flex-direction: column;
        gap: var(--spacing);
        align-items: stretch;
    }

    .vote-btn {
        width: 100%;
        padding: var(--spacing-md);
        font-size: 1rem;
    }

    .fab {
        width: 56px;
        height: 56px;
        bottom: calc(var(--spacing-lg) + env(safe-area-inset-bottom));
        right: var(--spacing-lg);
        font-size: 1.75rem;
    }

    /* Better spacing for bottom content on mobile */
    .suggestions-list {
        padding-bottom: calc(80px + env(safe-area-inset-bottom));
    }

    .toast {
        top: var(--spacing-md);
        right: var(--spacing-md);
        left: var(--spacing-md);
        max-width: none;
    }

    .form-group {
        margin-bottom: var(--spacing-lg);
    }

    .form-group input,
    .form-group textarea {
        padding: var(--spacing-md);
        font-size: 1rem;
    }

    /* Overlay mobile adjustments */
    .overlay {
        padding: var(--spacing-md);
    }

    .overlay-content {
        padding: var(--spacing-xl);
    }

    .overlay-icon {
        width: 64px;
        height: 64px;
        font-size: 2.5rem;
        margin-bottom: var(--spacing-lg);
    }

    /* Ensure touch targets are at least 44x44px */
    button, .back-btn, .fab {
        min-height: 44px;
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    .container {
        padding: var(--spacing);
    }

    .header {
        padding: var(--spacing) 0;
    }

    .header h1 {
        font-size: 1.75rem;
    }

    .header p {
        font-size: 0.9375rem;
    }

    .app-card {
        padding: var(--spacing-md);
    }

    .suggestion-card {
        padding: var(--spacing-md);
    }

    .fab {
        width: 52px;
        height: 52px;
        bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom));
        right: var(--spacing-md);
    }

    /* Reduce animation intensity on small screens for better performance */
    * {
        animation-duration: 0.15s !important;
        transition-duration: 0.15s !important;
    }

    /* Optimize hover effects - disable on touch devices */
    .app-card:hover,
    .suggestion-card:hover {
        transform: none;
    }
}