/* ============================================
   YanKep Login Page Styles - Landing Page V2
   Theme: Modern Glassmorphism & Vibrant Dark/Light Hybrid
   ============================================ */

:root {
    --brand-primary: #38bdf8;
    --brand-secondary: #0ea5e9;
    --brand-accent: #0284c7;
    
    --bg-color: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(0, 0, 0, 0.1);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --error: #ef4444;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Background Effects */
.bg-effects {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background: radial-gradient(circle at top right, #f1f5f9, #ffffff);
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite alternate;
}

.orb-1 {
    top: -10%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: var(--brand-primary);
}

.orb-2 {
    bottom: -20%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: #4f46e5;
    animation-delay: -5s;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(0, 0, 0, 0.05) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(0, 0, 0, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(circle at center, black, transparent 80%);
    -webkit-mask-image: radial-gradient(circle at center, black, transparent 80%);
}

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

/* Header */
.app-header {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--brand-primary);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.text-highlight {
    color: var(--brand-primary);
}

.main-nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-main);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-main);
    padding: 10px 24px;
    border-radius: var(--radius-full);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.15);
}

/* Main Content Layout */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    margin-top: 80px;
    padding: 40px 0;
}

.container.layout-split {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr 480px;
    gap: 80px;
    align-items: center;
}

/* Hero Section */
.hero-section {
    animation: fadeRight 0.8s ease-out forwards;
}

@keyframes fadeRight {
    from { opacity: 0; transform: translateX(-40px); }
    to { opacity: 1; transform: translateX(0); }
}

.badge {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(56, 189, 248, 0.15);
    color: var(--brand-primary);
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 4.2rem;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--brand-primary), #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-features {
    display: flex;
    gap: 20px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--card-border);
    padding: 16px 24px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.8);
    border-color: rgba(0, 0, 0, 0.15);
}

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

.f-text {
    font-weight: 600;
    font-size: 0.95rem;
}

/* Login Section & Card */
.login-section {
    animation: fadeLeft 0.8s ease-out forwards;
    animation-delay: 0.2s;
    opacity: 0;
}

@keyframes fadeLeft {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

.login-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 32px 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--brand-primary), transparent);
}

.login-header {
    text-align: center;
    margin-bottom: 24px;
}

.login-header h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.login-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-main);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    color: var(--text-muted);
    display: flex;
}

.input-icon svg {
    width: 18px;
    height: 18px;
}

.form-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 12px 14px 12px 42px;
    color: var(--text-main);
    font-size: 0.95rem;
    font-family: var(--font-body);
    transition: var(--transition);
    outline: none;
}

.form-input:focus {
    border-color: var(--brand-primary);
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15);
}

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

.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    transition: var(--transition);
}

.toggle-password:hover {
    color: var(--text-main);
}

.toggle-password svg {
    width: 20px;
    height: 20px;
}

/* Error States */
.error-message {
    font-size: 0.75rem;
    color: var(--error);
    margin-top: 4px;
    display: none;
}

.form-group.has-error .error-message {
    display: block;
}

.form-group.has-error .form-input {
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

.form-group.has-error .input-icon {
    color: var(--error);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    margin-top: 12px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.remember-me input {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 1px solid var(--text-muted);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.remember-me input:checked + .checkmark {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
}

.remember-me input:checked + .checkmark::after {
    content: '';
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-bottom: 2px;
}

.forgot-pwd {
    color: var(--brand-primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.forgot-pwd:hover {
    color: var(--text-main);
}

/* Primary Button */
.btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--brand-secondary), var(--brand-primary));
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 10px 20px rgba(56, 189, 248, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 25px rgba(56, 189, 248, 0.3);
}

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

.btn-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: none;
}

.btn-primary:hover .btn-shine {
    animation: shine 1.5s ease-out forwards;
}

@keyframes shine {
    to { left: 100%; }
}

/* Spinner Loader */
.btn-loader {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.register-link {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 24px;
}

.register-link a {
    color: var(--brand-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.register-link a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 1024px) {
    .container.layout-split {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 0 20px;
    }
    
    .hero-section {
        text-align: center;
    }
    
    .hero-subtitle {
        margin: 0 auto 32px;
    }
    
    .hero-features {
        justify-content: center;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    .hero-title {
        font-size: 2.8rem;
    }
    .hero-features {
        flex-direction: column;
        align-items: center;
    }
    .feature-card {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    .login-card {
        padding: 32px 24px;
    }
    .social-login {
        flex-direction: column;
    }
}