/* 
  Affiliate Link Generator - Modern UI
  Design: Glassmorphism + Dark Mode
*/

:root {
    /* Colors */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #f97316;
    --success: #10b981;
    --error: #ef4444;
    
    /* Shopee Orange & Lazada Blue */
    --shopee-color: #ee4d2d;
    --lazada-color: #0f146d;
    
    /* Background */
    --bg-dark: #0f0f23;
    --bg-card: rgba(30, 30, 60, 0.6);
    --bg-card-hover: rgba(40, 40, 80, 0.7);
    --bg-input: rgba(20, 20, 45, 0.8);
    
    /* Text */
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Border */
    --border-color: rgba(99, 102, 241, 0.2);
    --border-radius: 16px;
    --border-radius-sm: 8px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.2);
    
    /* Glassmorphism */
    --glass-blur: blur(20px);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    
    /* Animated gradient background */
    background: linear-gradient(135deg, #0f0f23 0%, #1a1a3e 50%, #0f0f23 100%);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ============== App Container ============== */
.app-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 24px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============== Header ============== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    margin-bottom: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 28px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-badge {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============== Hero Section ============== */
.hero {
    text-align: center;
    margin-bottom: 32px;
}

.hero-title {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 12px;
}

.gradient-text {
    display: block;
    background: linear-gradient(135deg, var(--shopee-color), var(--primary-light), var(--lazada-color));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientText 4s ease infinite;
}

@keyframes gradientText {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 16px;
}

/* ============== Converter Card ============== */
.converter-card {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 28px;
    box-shadow: var(--shadow-md), var(--shadow-glow);
    flex: 1;
}

/* ============== Input Section ============== */
.input-section {
    margin-bottom: 20px;
}

.input-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.label-icon {
    font-size: 16px;
}

.input-textarea,
.output-textarea {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 16px;
    font-size: 14px;
    font-family: inherit;
    color: var(--text-primary);
    resize: vertical;
    transition: var(--transition-fast);
}

.input-textarea:focus,
.output-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.input-textarea::placeholder,
.output-textarea::placeholder {
    color: var(--text-muted);
}

.char-count {
    text-align: right;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ============== Convert Button ============== */
.convert-btn {
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    border-radius: var(--border-radius-sm);
    color: white;
    font-size: 16px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.convert-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.convert-btn:active:not(:disabled) {
    transform: translateY(0);
}

.convert-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.convert-btn.loading .btn-icon,
.convert-btn.loading .btn-text {
    opacity: 0;
}

.btn-loader {
    display: none;
    position: absolute;
    width: 22px;
    height: 22px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.convert-btn.loading .btn-loader {
    display: block;
}

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

/* ============== Output Section ============== */
.output-section {
    margin-top: 24px;
    display: none;
}

.output-section.visible {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.output-container {
    position: relative;
}

.output-textarea {
    padding-right: 50px;
}

.copy-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: var(--transition-fast);
}

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

/* ============== Stats Container ============== */
.stats-container {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.stat-item {
    flex: 1;
    background: var(--bg-input);
    border-radius: var(--border-radius-sm);
    padding: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.stat-icon {
    font-size: 18px;
    display: block;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 16px;
    font-weight: 700;
    display: block;
}

.stat-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-shopee .stat-value { color: var(--shopee-color); }
.stat-lazada .stat-value { color: #1e88e5; }
.stat-time .stat-value { color: var(--success); }

/* ============== Footer ============== */
.footer {
    text-align: center;
    padding: 24px 0;
    color: var(--text-muted);
    font-size: 14px;
    margin-top: auto;
}

/* ============== Toast ============== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--success);
    border-radius: var(--border-radius-sm);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transition: var(--transition-normal);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ============== Error States ============== */
.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--border-radius-sm);
    padding: 12px 16px;
    margin-top: 12px;
    color: var(--error);
    font-size: 14px;
}

/* ============== Responsive ============== */
@media (max-width: 640px) {
    .app-container {
        padding: 16px;
    }
    
    .hero-title {
        font-size: 26px;
    }
    
    .converter-card {
        padding: 20px;
    }
    
    .stats-container {
        flex-direction: column;
        gap: 8px;
    }
    
    .stat-item {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 12px;
        padding: 10px;
    }
    
    .stat-icon {
        margin-bottom: 0;
    }
}