/* ========================================
   CSS VARIABLES & RESET
   ======================================== */

:root {
    /* Colors */
    --primary: #667eea;
    --primary-dark: #5a6fd6;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-light: #f0f2f8;
    --text-dark: #1e2433;
    --text-muted: #8892a4;

    /* Theme Pink */
    --pink-bg: linear-gradient(135deg, #ffeef8 0%, #ffe0f0 100%);
    --pink-primary: #c2185b;
    --pink-secondary: #ad1457;
    --pink-accent: #880e4f;

    /* Theme Tosca */
    --tosca-bg: linear-gradient(135deg, #e0f9f9 0%, #c7f5f5 100%);
    --tosca-primary: #00838f;
    --tosca-secondary: #00695c;
    --tosca-accent: #004d40;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border Radius */
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* Shadows */
    --shadow-sm: 0 1px 4px rgba(0,0,0,0.06), 0 4px 12px rgba(102,126,234,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 8px 24px rgba(102,126,234,0.1);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1), 0 16px 48px rgba(102,126,234,0.12);
    --shadow-glow: 0 0 0 3px rgba(102,126,234,0.18);

    /* Transitions */
    --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-light);
    background-image:
        radial-gradient(ellipse at 20% 0%, rgba(102,126,234,0.12) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 100%, rgba(118,75,162,0.1) 0%, transparent 60%);
    background-attachment: fixed;
    color: var(--text-dark);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   LAYOUT
   ======================================== */
.app-container {
    max-width: 480px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
}

.view {
    display: none;
    animation: fadeSlideIn var(--transition-slow);
}

.view.active {
    display: block;
}

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========================================
   APP HEADER  — lebih berkarakter
   ======================================== */
.app-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-top: var(--spacing-lg);
}

.app-header .logo {
    font-size: 68px;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
    animation: float 3.5s ease-in-out infinite;
    filter: drop-shadow(0 8px 16px rgba(102,126,234,0.25));
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(-2deg); }
    50% { transform: translateY(-12px) rotate(2deg); }
}

.app-header h1 {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.app-header p {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

/* ========================================
   FORM STYLES
   ======================================== */
.form-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Form Section — glassmorphism ringan */
.form-section {
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.9);
    position: relative;
    overflow: hidden;
    transition: box-shadow var(--transition-base);
}

.form-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.form-section:focus-within {
    box-shadow: var(--shadow-md);
}

.form-section:focus-within::before {
    opacity: 1;
}

.form-label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

/* Input Styles */
.input-wrapper {
    position: relative;
}

.text-input {
    width: 100%;
    padding: 13px var(--spacing-md);
    padding-right: 52px;
    border: 1.5px solid #e8eaf0;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: inherit;
    font-weight: 500;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    background: #fafbfc;
    color: var(--text-dark);
    letter-spacing: -0.01em;
}

.text-input:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: var(--shadow-glow);
}

.text-input::placeholder {
    color: #c5cad6;
    font-weight: 400;
}

/* Character Counter */
.char-counter {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    font-weight: 700;
    color: #c5cad6;
    transition: color var(--transition-fast);
    letter-spacing: 0.02em;
}

.char-counter.warning { color: #f39c12; }
.char-counter.danger { color: #e74c3c; }

/* Checkbox Styles */
.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding: 10px var(--spacing-sm);
    background: #f5f6fa;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1.5px solid transparent;
    transition: all var(--transition-fast);
}

.checkbox-wrapper:hover {
    background: #eeefff;
    border-color: rgba(102,126,234,0.2);
}

.checkbox-input {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
    flex-shrink: 0;
}

.checkbox-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    user-select: none;
}

/* ========================================
   THEME SELECTOR — lebih immersive
   ======================================== */
.theme-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.theme-option {
    text-align: center;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.theme-option:active {
    transform: scale(0.96);
}

.theme-preview {
    width: 100%;
    aspect-ratio: 3/4;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2.5px solid transparent;
    transition: all var(--transition-base);
    margin-bottom: var(--spacing-xs);
    position: relative;
    overflow: hidden;
}

/* Shimmer accent on hover */
.theme-preview::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.4) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.theme-option:hover .theme-preview::after {
    opacity: 1;
}

.theme-preview-pink {
    background: var(--pink-bg);
}

.theme-preview-tosca {
    background: var(--tosca-bg);
}

.theme-option.selected .theme-preview {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(102,126,234,0.15), var(--shadow-md);
}

.theme-icon {
    font-size: 44px;
    display: block;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
    transition: transform var(--transition-base);
}

.theme-option:hover .theme-icon {
    transform: scale(1.1) translateY(-2px);
}

.theme-name {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-dark);
    letter-spacing: 0.02em;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn-primary {
    width: 100%;
    padding: 15px var(--spacing-md);
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 15px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    box-shadow: 0 4px 16px rgba(102,126,234,0.35), 0 1px 3px rgba(0,0,0,0.1);
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transition: left 0.5s ease;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102,126,234,0.4), 0 2px 6px rgba(0,0,0,0.12);
}

.btn-primary:active {
    transform: translateY(0) scale(0.99);
}

.btn-secondary {
    width: 100%;
    padding: 12px var(--spacing-md);
    background: rgba(255,255,255,0.7);
    color: var(--text-dark);
    border: 1.5px solid #e8eaf0;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.btn-secondary:hover {
    background: white;
    border-color: #c5cad6;
    box-shadow: var(--shadow-sm);
}

/* ========================================
   CARD DISPLAY
   ======================================== */
.card-display {
    margin-bottom: var(--spacing-lg);
}

.greeting-card {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    min-height: 500px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.greeting-card.theme-pink { background: var(--pink-bg); }
.greeting-card.theme-pink .card-name { color: var(--pink-primary); }
.greeting-card.theme-pink .card-subtitle { color: var(--pink-secondary); }
.greeting-card.theme-pink .card-greeting { color: var(--pink-accent); }
.greeting-card.theme-pink .card-year { color: var(--pink-primary); }

.greeting-card.theme-tosca { background: var(--tosca-bg); }
.greeting-card.theme-tosca .card-name { color: var(--tosca-primary); }
.greeting-card.theme-tosca .card-subtitle { color: var(--tosca-secondary); }
.greeting-card.theme-tosca .card-greeting { color: var(--tosca-accent); }
.greeting-card.theme-tosca .card-year { color: var(--tosca-primary); }

.card-ornament-top { margin-bottom: var(--spacing-lg); }
.card-name { font-size: 32px; font-weight: 700; margin-bottom: var(--spacing-md); line-height: 1.2; }
.card-subtitle { font-size: 16px; font-weight: 500; margin-bottom: var(--spacing-sm); opacity: 0.9; }
.card-greeting { font-size: 24px; font-weight: 700; margin-bottom: var(--spacing-lg); line-height: 1.4; }
.card-year { font-size: 28px; font-weight: 700; }
.card-ornament-bottom { margin-top: var(--spacing-lg); }

.decoration-stars,
.decoration-leaves {
    position: absolute;
    pointer-events: none;
}

.decoration-stars { top: 30px; left: 50%; transform: translateX(-50%); }
.decoration-leaves { bottom: 0; left: 50%; transform: translateX(-50%); }

/* ========================================
   SHARE SECTION — upgrade total
   ======================================== */
.share-section {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255,255,255,0.9);
}

.share-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-muted);
    text-align: center;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

/* Share Buttons */
.share-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.btn-share {
    flex: 1;
    padding: 13px var(--spacing-sm);
    border: none;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    color: white;
    letter-spacing: 0.01em;
    position: relative;
    overflow: hidden;
}

.btn-share:active {
    transform: scale(0.97);
}

.btn-whatsapp {
    background: linear-gradient(135deg, #25D366, #1aab54);
    box-shadow: 0 3px 12px rgba(37,211,102,0.3);
}

.btn-whatsapp:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(37,211,102,0.4);
}

.btn-telegram {
    background: linear-gradient(135deg, #0088cc, #0066a8);
    box-shadow: 0 3px 12px rgba(0,136,204,0.3);
}

.btn-telegram:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0,136,204,0.4);
}

/* URL Container */
.url-container {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    background: #f5f6fa;
    border-radius: var(--radius-md);
    padding: 6px;
    border: 1.5px solid #e8eaf0;
}

.url-input {
    flex: 1;
    padding: 8px var(--spacing-xs);
    border: none;
    border-radius: calc(var(--radius-md) - 4px);
    font-size: 11px;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    background: transparent;
    color: var(--text-muted);
    letter-spacing: 0.01em;
}

.url-input:focus {
    outline: none;
}

.btn-copy {
    padding: 8px 14px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: calc(var(--radius-md) - 4px);
    font-size: 15px;
    cursor: pointer;
    transition: all var(--transition-base);
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(102,126,234,0.3);
}

.btn-copy:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(102,126,234,0.4);
}

.btn-copy:active {
    transform: scale(0.97);
}

/* QR Code Container */
.qr-container {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    border: 1.5px solid #e8eaf0;
    box-shadow: var(--shadow-sm);
}

#qr-canvas {
    border-radius: var(--radius-sm);
    display: block;
}

/* Download Button */
.btn-download {
    width: 100%;
    padding: 13px var(--spacing-md);
    background: var(--text-dark);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    letter-spacing: -0.01em;
    box-shadow: 0 3px 12px rgba(30,36,51,0.2);
}

.btn-download:hover {
    background: #151a26;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30,36,51,0.28);
}

.btn-download:active {
    transform: translateY(0) scale(0.99);
}

/* ========================================
   TOAST NOTIFICATION
   ======================================== */
.toast {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(30,36,51,0.92);
    backdrop-filter: blur(8px);
    color: white;
    padding: 11px var(--spacing-lg);
    border-radius: var(--radius-xl);
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    box-shadow: var(--shadow-lg);
    transition: bottom var(--transition-base);
    z-index: 1000;
    max-width: 90%;
    text-align: center;
    letter-spacing: 0.01em;
    border: 1px solid rgba(255,255,255,0.1);
}

.toast.show {
    bottom: var(--spacing-lg);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 375px) {
    .app-container { padding: var(--spacing-md); }
    .card-name { font-size: 28px; }
    .card-greeting { font-size: 20px; }
    .card-year { font-size: 24px; }
}

@media (min-width: 768px) {
    .app-container { padding: var(--spacing-xl); }
}