/* ============================================
   Birthday Reminder PWA - Styles
   Modern dark theme with glassmorphism effects
   ============================================ */

:root {
    /* Color Palette */
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --glass: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.15);
    
    --accent-gradient: linear-gradient(135deg, #ff6b6b 0%, #feca57 50%, #ff9ff3 100%);
    --accent-primary: #ff6b6b;
    --accent-secondary: #feca57;
    --accent-tertiary: #ff9ff3;
    
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);
    
    --danger: #ff4757;
    --success: #2ed573;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Safe areas for iOS */
    --safe-top: env(safe-area-inset-top, 20px);
    --safe-bottom: env(safe-area-inset-bottom, 20px);
}

/* ============================================
   Base Styles
   ============================================ */

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    line-height: 1.5;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(255, 107, 107, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 159, 243, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(254, 202, 87, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ============================================
   App Container
   ============================================ */

.app-container {
    position: relative;
    z-index: 1;
    max-width: 500px;
    margin: 0 auto;
    padding: var(--spacing-md);
    padding-top: calc(var(--safe-top) + var(--spacing-md));
    padding-bottom: calc(var(--safe-bottom) + 100px);
}

/* ============================================
   Header
   ============================================ */

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

.app-title {
    font-size: 2rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.app-title .emoji {
    -webkit-text-fill-color: initial;
    font-size: 2.2rem;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.app-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: var(--spacing-xs);
    font-weight: 400;
}

/* ============================================
   Upcoming Birthday Banner
   ============================================ */

.upcoming-banner {
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    position: relative;
    overflow: hidden;
    animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 4px 30px rgba(255, 107, 107, 0.3); }
    to { box-shadow: 0 4px 40px rgba(255, 159, 243, 0.4); }
}

.upcoming-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.upcoming-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.upcoming-icon {
    font-size: 2.5rem;
    animation: party 1s ease-in-out infinite;
}

@keyframes party {
    0%, 100% { transform: rotate(-5deg); }
    50% { transform: rotate(5deg); }
}

.upcoming-text {
    display: flex;
    flex-direction: column;
}

.upcoming-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

.upcoming-name {
    font-size: 1.4rem;
    font-weight: 700;
}

.upcoming-date {
    font-size: 0.9rem;
    opacity: 0.9;
}

.upcoming-banner.hidden {
    display: none;
}

/* ============================================
   Add Birthday Form
   ============================================ */

.add-section {
    margin-bottom: var(--spacing-xl);
}

.add-form {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

@media (max-width: 400px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.input-group input {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-normal);
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.2);
}

.input-group input::placeholder {
    color: var(--text-muted);
}

/* Date input styling for iOS */
input[type="date"] {
    -webkit-appearance: none;
    appearance: none;
}

input[type="date"]::-webkit-date-and-time-value {
    text-align: left;
}

.btn-add {
    width: 100%;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-add::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-slow);
}

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

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

.btn-icon {
    font-size: 1.3rem;
    font-weight: 300;
}

/* ============================================
   Birthday List
   ============================================ */

.list-section {
    margin-bottom: var(--spacing-xl);
}

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

.list-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.birthday-count {
    background: var(--glass);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.birthday-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* Birthday Card */
.birthday-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: var(--transition-normal);
    animation: slideIn 0.3s ease;
}

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

.birthday-card:hover {
    background: var(--bg-card-hover);
    transform: translateX(5px);
}

.birthday-card.upcoming {
    border-left: 3px solid var(--accent-primary);
}

.birthday-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
    flex-shrink: 0;
    text-transform: uppercase;
}

.birthday-info {
    flex: 1;
    min-width: 0;
}

.birthday-name {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.birthday-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.birthday-countdown {
    font-size: 0.75rem;
    color: var(--accent-secondary);
    font-weight: 500;
    margin-top: 2px;
}

.birthday-countdown.today {
    color: var(--accent-primary);
    font-weight: 700;
}

.birthday-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.btn-action {
    background: var(--glass);
    border: none;
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 1rem;
}

.btn-action:hover {
    background: var(--bg-card-hover);
}

.btn-action.delete:hover {
    background: rgba(255, 71, 87, 0.2);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) * 2;
    color: var(--text-secondary);
}

.empty-state.hidden {
    display: none;
}

.empty-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.empty-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* ============================================
   Notification Banner
   ============================================ */

.notification-banner {
    position: fixed;
    bottom: var(--safe-bottom);
    left: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    z-index: 100;
    animation: slideUp 0.3s ease;
    max-width: 500px;
    margin: 0 auto;
}

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

.notification-banner.hidden {
    display: none;
}

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

.notification-icon {
    font-size: 1.5rem;
}

.notification-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.btn-enable {
    background: var(--accent-primary);
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: white;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.btn-enable:hover {
    background: var(--accent-secondary);
}

/* ============================================
   Modal Styles
   ============================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    width: 100%;
    max-width: 400px;
    transform: scale(0.9) translateY(20px);
    transition: var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

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

.modal-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-form .input-group {
    margin-bottom: var(--spacing-md);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.btn-cancel, .btn-save, .btn-delete {
    flex: 1;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.btn-cancel:hover {
    background: var(--bg-card-hover);
}

.btn-save {
    background: var(--accent-gradient);
    border: none;
    color: white;
}

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

.btn-delete {
    background: var(--danger);
    border: none;
    color: white;
}

.btn-delete:hover {
    background: #ff6b7a;
}

.modal-delete .delete-message {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Scrollbar Styling
   ============================================ */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--glass);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--glass-border);
}

/* ============================================
   Print Styles (hide UI elements)
   ============================================ */

@media print {
    .notification-banner,
    .add-section,
    .birthday-actions {
        display: none !important;
    }
}