/**
 * Premium Login Page - Lavian Spa
 * UI/UX Pro Max: Eye-catching, Refined & Creative Design
 * 
 * Design Features:
 * - Animated gradient backgrounds
 * - Glassmorphism effects
 * - Smooth micro-interactions
 * - Creative visual hierarchy
 * - Modern color palette
 * - Professional yet eye-catching
 */

/**
 * Premium Login Page - Lavian Spa
 * Uses shared variables from colors.css and spacing.css
 * 
 * Note: 
 * - Colors are imported from colors.css
 * - Spacing, radius, and transitions are imported from spacing.css
 */

/* ========== ELANI LOGIN THEME (scoped to login page) ==========
   Trước đây khối này hardcode "NITA navy/blue" KHÔNG đổi theo theme — vì gắn
   trên .login-page (= <body>), nó định nghĩa lại --color-primary/... cục bộ,
   GHI ĐÈ hoàn toàn biến toàn cục của brand.css (body gần DOM hơn html nên
   thắng, bất kể :root/html[data-theme] nói gì). Đây là lý do login trước đó
   luôn xanh dù đã đổi brand sang nâu/gold. Sửa lại: light = mocha (elani), dark = gold,
   khớp đúng phần còn lại của app. */
.login-page {
    --color-bg-dark: #FAF6F0;
    --color-bg-dark-secondary: #FAF6F0;

    /* LIGHT = palette "Mocha" của elani.com.vn (khớp :root của brand.css).
       Dark khai báo lại gold bên dưới — mọi biến ở khối này PHẢI có mặt
       trong khối dark, nếu không dark sẽ ăn nhầm giá trị light. */
    --color-primary: #694A34;
    --color-primary-light: #8A6B4F;
    --color-primary-dark: #3E2C20;
    --color-primary-hover: #3E2C20;

    --color-primary-10: rgba(105, 74, 52, 0.08);
    --color-primary-20: rgba(105, 74, 52, 0.16);
    --color-primary-30: rgba(105, 74, 52, 0.24);
    --color-primary-400: #B08968;
    --color-primary-600: #5A3F2D;
    --color-primary-90: rgba(105, 74, 52, 0.9);

    --color-accent: #C2A06B;

    --gradient-primary: linear-gradient(120deg, #694A34, #3E2C20);
    --gradient-primary-light: linear-gradient(120deg, #8A6B4F 0%, #694A34 100%);
    --gradient-primary-dark: linear-gradient(120deg, #694A34 0%, #3E2C20 100%);
    --gradient-primary-full: linear-gradient(120deg, #8A6B4F 0%, #694A34 50%, #3E2C20 100%);
    --gradient-ocean: linear-gradient(135deg, #FAF6F0 0%, #F3EADF 50%, #EDE1D2 100%);
    --gradient-ocean-light: linear-gradient(120deg, #694A34 0%, #3E2C20 100%);
    --gradient-ocean-subtle: linear-gradient(135deg, rgba(105, 74, 52,0.08) 0%, rgba(176,137,104,0.08) 100%);
    --gradient-soft: linear-gradient(120deg, #694A34, #3E2C20);

    --shadow-primary: 0 10px 28px -14px rgba(62, 44, 32, 0.35);
    --shadow-primary-md: 0 20px 55px -24px rgba(62, 44, 32, 0.45);
    --shadow-primary-glow: 0 0 40px rgba(194, 160, 107, 0.25);

    /* Nền mocha + chữ trắng = 7.4:1. */
    --color-text-on-primary: #FFFFFF;
    --color-text-primary: #2C2019;
    --color-text-secondary: #4A3C31;
    --color-text-muted: #7B6A5C;

    --color-border: #E7DACB;
    --color-border-focus: #694A34;
    --color-border-glass: rgba(62, 44, 32, 0.10);
    --color-border-glass-light: rgba(62, 44, 32, 0.06);

    --color-bg-glass: rgba(255, 255, 255, 0.9);
    --color-bg-glass-light: rgba(62, 44, 32, 0.04);

    /* Visual-side (left panel) backdrop — light: espresso → mocha (như dải
       topbar/stats của elani) + glow gold-soft; logo vẫn bản GOLD (xem
       brand.css "LOGIN LOGO"). Dark: đen + glow gold (khối dưới). */
    --color-visual-base: #3E2C20;
    --color-visual-grad-start: rgba(44, 32, 25, 0.94);
    --color-visual-grad-mid: #3E2C20;
    --color-visual-grad-end: #694A34;
    --color-visual-glow: rgba(194, 160, 107, 0.22);
}

html[data-theme="dark"] .login-page {
    --color-bg-dark: #0A0908;
    --color-bg-dark-secondary: #100E0C;

    --color-primary: var(--brand-gold-500, #D4AF37);
    --color-primary-light: var(--brand-gold-400, #E8C87A);
    --color-primary-dark: var(--brand-gold-600, #C9A227);
    --color-primary-hover: var(--brand-gold-400, #E8C87A);

    --color-primary-10: rgba(212, 175, 55, 0.1);
    --color-primary-20: rgba(212, 175, 55, 0.2);
    --color-primary-30: rgba(212, 175, 55, 0.3);
    --color-primary-400: var(--brand-gold-400, #E8C87A);
    --color-primary-600: var(--brand-gold-600, #C9A227);
    --color-primary-90: rgba(10, 9, 8, 0.9);

    --color-accent: var(--brand-gold-600, #C9A227);

    --gradient-primary: linear-gradient(135deg, #C9A227, #D4AF37, #E8C87A);
    --gradient-primary-light: linear-gradient(135deg, #E8C87A 0%, #D4AF37 50%, #C9A227 100%);
    --gradient-primary-dark: linear-gradient(135deg, #C9A227 0%, #D4AF37 100%);
    --gradient-primary-full: linear-gradient(135deg, #C9A227 0%, #D4AF37 50%, #E8C87A 100%);
    --gradient-ocean: linear-gradient(135deg, #0A0908 0%, #100E0C 50%, #171512 100%);
    --gradient-ocean-light: linear-gradient(135deg, #D4AF37 0%, #C9A227 50%, #E8C87A 100%);
    --gradient-ocean-subtle: linear-gradient(135deg, rgba(212,175,55,0.12) 0%, rgba(201,162,39,0.12) 100%);
    --gradient-soft: linear-gradient(135deg, #D4AF37, #C9A227);

    --shadow-primary: 0 4px 14px rgba(212, 175, 55, 0.4);
    --shadow-primary-md: 0 8px 30px rgba(212, 175, 55, 0.5);
    --shadow-primary-glow: 0 0 40px rgba(212, 175, 55, 0.3);

    --color-text-primary: #F7F5F2;
    --color-text-secondary: #D3CCC2;
    --color-text-muted: #A89E93;

    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-focus: var(--brand-gold-500, #D4AF37);
    --color-border-glass: rgba(255, 255, 255, 0.08);
    --color-border-glass-light: rgba(255, 255, 255, 0.05);

    --color-bg-glass: rgba(16, 14, 12, 0.85);
    --color-bg-glass-light: rgba(255, 255, 255, 0.06);

    /* Nền gold + chữ trắng chỉ ~1.9:1 — không đọc được. Dùng nâu đậm. */
    --color-text-on-primary: #2A1A0F;

    /* Visual-side backdrop DARK theme — "dark - gold - black, chỉ 1 chút
       nâu" (yêu cầu riêng cho dark mode). Trước đây dùng thẳng thang nâu
       (brown-900/800/700) làm nền + gradient chính → cả panel ngả màu hổ
       phách/nâu ấm, không "đen" như comment gốc mô tả. Đổi nền/gradient giữa
       về ĐEN, nâu chỉ còn ở gradient-end với alpha thấp (hoà dần vào đen ở
       góc) làm điểm nhấn nhẹ; gold glow tăng nhẹ để rõ vai trò accent.
       Light theme giữ nguyên nâu đậm — không đổi theo yêu cầu lần này. */
    --color-visual-base: #0A0908;
    --color-visual-grad-start: rgba(10, 9, 8, 0.95);
    --color-visual-grad-mid: #171512;
    --color-visual-grad-end: rgba(58, 28, 0, 0.2);
    --color-visual-glow: rgba(212, 175, 55, 0.24);
}

/* Link chữ "Quên mật khẩu?" / "Quay lại đăng nhập" (trước là inline
   color:#1a56db ở cả 2 theme). Light = mocha theo palette elani; dark giữ
   nguyên xanh cũ. */
.login-text-link {
    color: var(--color-primary);
    text-decoration: none;
}
.login-text-link:hover,
.login-text-link:focus {
    color: var(--color-primary-hover);
    text-decoration: none;
}
html[data-theme="dark"] .login-text-link,
html[data-theme="dark"] .login-text-link:hover,
html[data-theme="dark"] .login-text-link:focus {
    color: #1a56db;
}

/* ========== DARK-THEME INPUT OVERRIDES ==========
   Base .form-input (dòng ~649) đã dùng var(--color-text-primary)/
   var(--color-border)/... nên TỰ đúng ở light theme (chữ tối trên nền sáng).
   Khối này CHỈ ghi đè cho dark theme (form-side nền gần đen, cần chữ sáng +
   input translucent trắng) — trước đây áp dụng vô điều kiện nên ở light
   theme chữ trắng sẽ biến mất trên nền trắng. */
html[data-theme="dark"] .login-page .form-input {
    color: #FFFFFF;
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

html[data-theme="dark"] .login-page .form-input::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

html[data-theme="dark"] .login-page .form-input:hover {
    border-color: rgba(212, 175, 55, 0.5);
    background: rgba(255, 255, 255, 0.09);
    box-shadow: 0 4px 8px rgba(212, 175, 55, 0.1);
}

html[data-theme="dark"] .login-page .form-input:focus {
    border-color: #D4AF37;
    background: rgba(255, 255, 255, 0.1);
    box-shadow:
        0 0 0 4px rgba(212, 175, 55, 0.15),
        0 4px 14px rgba(212, 175, 55, 0.3);
}

html[data-theme="dark"] .login-page .form-label {
    color: rgba(255, 255, 255, 0.85);
}

html[data-theme="dark"] .login-page .login-footer {
    border-top-color: rgba(255, 255, 255, 0.08);
}

html[data-theme="dark"] .login-page .footer-text {
    color: rgba(255, 255, 255, 0.4);
}

/* ========== NITA LOGO STYLES ========== */
.login-nita-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.nita-logo-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e3a8a, #4f87ff, #93c5fd);
    border-radius: 16px;
    font-size: 28px;
    box-shadow: 0 8px 24px rgba(79, 135, 255, 0.45);
    flex-shrink: 0;
}

/* Alan logo image — replaces emoji + text wordmark */
.nita-logo-img {
    height: 64px;
    width: auto;
    max-width: 240px;
    object-fit: contain;
    filter: drop-shadow(0 6px 18px rgba(79, 135, 255, 0.35));
    transition: transform 0.3s ease, filter 0.3s ease;
}
.nita-logo-img:hover {
    transform: scale(1.04);
    filter: drop-shadow(0 8px 24px rgba(79, 135, 255, 0.5));
}

/* Mobile logo — slightly smaller */
.login-logo-mobile .nita-logo-img {
    height: 48px;
}

.nita-logo-name {
    font-size: 32px;
    font-weight: 800;
    color: #FFFFFF;
    letter-spacing: 0.08em;
    line-height: 1;
}

.nita-logo-sep {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.35);
    font-weight: 300;
    line-height: 1;
    align-self: center;
}

/* Mobile NITA brand in card */
.login-logo-mobile .login-nita-brand {
    justify-content: center;
    margin-bottom: 0;
    animation: none;
}

/* ========== BASE STYLES ========== */
.login-page {
    background: var(--color-bg-dark);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    overflow: hidden;
    position: relative;
}

/* ========== ANIMATED BACKGROUND - Refined Gradients ========== */
.login-page::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--color-primary-light);
    animation: gradientShift 20s ease-in-out infinite;
    opacity: 0.4;
    z-index: 0;
}

.login-page::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, var(--color-primary-30) 0%, transparent 60%),
        radial-gradient(circle at 80% 80%, var(--color-primary-600) 0%, transparent 60%),
        radial-gradient(circle at 50% 20%, var(--color-primary-400) 0%, transparent 50%);
    animation: pulse 12s ease-in-out infinite;
    z-index: 0;
    pointer-events: none;
}

@keyframes gradientShift {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg) scale(1);
    }
    33% {
        transform: translate(20px, 20px) rotate(5deg) scale(1.05);
    }
    66% {
        transform: translate(-15px, 15px) rotate(-5deg) scale(0.98);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.4;
    }
    50% {
        opacity: 0.6;
    }
}

/* ========== LOGIN WRAPPER ========== */
.login-wrapper {
    display: flex;
    min-height: 100vh;
    width: 100%;
    position: relative;
    z-index: 1;
}

/* ========== VISUAL SIDE (Left) - Enhanced ========== */
.login-visual-side {
    flex: 1;
    background: var(--color-visual-base);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl);
    overflow: hidden;
    min-width: 0;
    background-image:
        linear-gradient(135deg, var(--color-visual-grad-start) 0%, var(--color-visual-grad-mid) 50%, var(--color-visual-grad-end) 100%),
        radial-gradient(circle at top left, var(--color-visual-glow) 0%, transparent 50%),
        radial-gradient(circle at bottom right, var(--color-visual-grad-mid) 0%, transparent 50%);
}

.login-visual-side::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(20px, -20px) scale(1.1);
    }
}

.visual-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.15;
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(255, 255, 255, 0.05) 35px, rgba(255, 255, 255, 0.05) 70px);
    pointer-events: none;
}

.visual-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 520px;
    color: var(--color-text-white);
    animation: fadeInUp 0.8s ease-out;
}

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

.visual-logo {
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.brand-logo {
    max-width: 200px;
    height: auto;
    filter: brightness(0) invert(1);
    transition: var(--transition);
}

.brand-logo:hover {
    transform: scale(1.05);
    filter: brightness(0) invert(1) drop-shadow(0 0 20px rgba(255, 255, 255, 0.5));
}

.visual-title {
    margin-bottom: var(--spacing-3xl);
}

.visual-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-bg-glass-light);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-glass);
    transition: var(--transition);
    cursor: default;
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.feature-item:hover::before {
    left: 100%;
}

.feature-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(8px) translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-glass-light);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
    font-size: 24px;
    transition: var(--transition);
    border: 1px solid var(--color-border-glass);
}

.feature-item:hover .feature-icon {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1) rotate(5deg);
}

.feature-text h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 0 0 var(--spacing-xs) 0;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.feature-text p {
    font-size: 15px;
    line-height: 1.6;
    margin: 0;
    opacity: 0.9;
}

/* ========== FORM SIDE (Right) - Glassmorphism ========== */
.login-form-side {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    background: var(--color-bg-dark-secondary);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    min-width: 0;
    overflow-y: auto;
    position: relative;
}

.login-form-side::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-primary-10);
    opacity: 0.5;
    pointer-events: none;
}

.login-container {
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
    animation: fadeInRight 0.8s ease-out;
}

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

/* ========== LOGIN CARD - Glassmorphism ========== */
.login-card {
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border-glass);
    border-radius: var(--radius-2xl);
    box-shadow: 
        var(--shadow-xl),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    padding: var(--spacing-3xl);
    width: 100%;
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--color-primary-10) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
    pointer-events: none;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.login-card:hover {
    box-shadow: 
        0 25px 70px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.2) inset,
        var(--shadow-primary-glow);
    transform: translateY(-4px);
}

/* ========== MOBILE LOGO ========== */
.login-logo-mobile {
    display: none;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-primary-10);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-primary-20);
}

.mobile-logo {
    max-width: 140px;
    height: auto;
    filter: 
        drop-shadow(var(--shadow-primary))
        drop-shadow(var(--shadow-sm));
    transition: var(--transition);
}

.mobile-logo:hover {
    filter: 
        drop-shadow(var(--shadow-primary-md))
        drop-shadow(var(--shadow-md));
    transform: scale(1.05);
}

/* ========== HEADER ========== */
.login-header {
    margin-bottom: var(--spacing-2xl);
    text-align: center;
}

.login-title {
    font-size: 36px;
    font-weight: 700;
    background: var(--color-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 var(--spacing-sm) 0;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.login-subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* ========== FORM STYLES ========== */
.login-form {
    margin-bottom: var(--spacing-xl);
}

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

.form-group-modern:last-of-type {
    margin-bottom: var(--spacing-2xl);
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.form-label i {
    font-size: 14px;
    color: var(--color-primary);
    transition: var(--transition);
}

.form-group-modern:focus-within .form-label i {
    color: var(--color-primary);
    transform: scale(1.1);
}

/* ========== INPUT WRAPPER ========== */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.form-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 15px;
    line-height: 1.5;
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    outline: none;
    box-shadow: var(--shadow-sm);
}

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

.form-input:hover {
    border-color: var(--color-primary-light);
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 8px var(--color-primary-10);
}

.form-input:focus {
    border-color: var(--color-border-focus);
    background: rgba(255, 255, 255, 1);
    box-shadow: 
        0 0 0 4px var(--color-primary-10),
        var(--shadow-primary);
    transform: translateY(-1px);
}

/* Password Toggle */
.password-toggle {
    position: absolute;
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 16px;
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 1;
    outline: none;
    border-radius: var(--radius-sm);
    width: 32px;
    height: 32px;
}

.password-toggle:hover {
    color: var(--color-primary);
    background: var(--color-primary-10);
    transform: scale(1.1);
}

.password-toggle:focus {
    color: var(--color-primary);
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ========== ERROR STATES ========== */
.form-group-modern.has-error .form-input {
    border-color: var(--color-border-error);
    padding-right: 48px;
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

.form-group-modern.has-error .form-input:focus {
    border-color: var(--color-border-error);
    box-shadow: 0 0 0 4px var(--color-danger-10);
}

.form-group-modern.has-error .form-label i {
    color: var(--color-border-error);
}

.error-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    font-size: 13px;
    color: var(--color-border-error);
    line-height: 1.4;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.error-message i {
    font-size: 14px;
}

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

/* ========== LOGIN BUTTON - Premium ========== */
.btn-login {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 16px;
    font-weight: 600;
    /* Light: chữ trắng trên mocha. Dark: nâu đậm trên gold (gold + chữ
       trắng chỉ ~1.9:1). Xem --color-text-on-primary. */
    color: var(--color-text-on-primary);
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: var(--transition-slow);
    box-shadow: 
        var(--shadow-primary),
        var(--shadow-sm);
    outline: none;
    position: relative;
    overflow: hidden;
}

.btn-login::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s;
}

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

.btn-login::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-login:hover::after {
    width: 300px;
    height: 300px;
}

.btn-login:hover {
    transform: translateY(-3px);
    box-shadow: 
        var(--shadow-primary-md),
        var(--shadow-md),
        var(--shadow-primary-glow);
    background: var(--color-primary-light);
}

/* Light: hover tối về espresso như nút "Đặt lịch" của elani (dark giữ gold
   sáng dần — --color-primary-light). */
html:not([data-theme="dark"]) .login-page .btn-login:hover {
    background: var(--color-primary-hover);
}

.btn-login:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-primary);
}

.btn-login:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
}

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-login.loading {
    pointer-events: none;
}

.btn-text {
    display: inline-block;
    position: relative;
    z-index: 1;
}

.btn-icon {
    font-size: 14px;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.btn-login:hover .btn-icon {
    transform: translateX(6px);
}

/* ========== FOOTER ========== */
.login-footer {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.footer-text {
    font-size: 13px;
    color: var(--color-text-muted);
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.footer-text i {
    font-size: 12px;
    color: var(--color-success);
    animation: pulseIcon 2s ease-in-out infinite;
}

@keyframes pulseIcon {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 1024px) {
    .login-wrapper {
        flex-direction: column;
    }

    .login-visual-side {
        min-height: 40vh;
        padding: var(--spacing-2xl);
    }

    .visual-content {
        max-width: 100%;
    }

    .visual-features {
        flex-direction: row;
        gap: var(--spacing-md);
        overflow-x: auto;
    }

    .feature-item {
        min-width: 280px;
        flex-shrink: 0;
    }

    .login-form-side {
        padding: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    /* Hide visual side on mobile - only show form */
    .login-visual-side {
        display: none;
    }

    .login-form-side {
        width: 100%;
        padding: var(--spacing-xl);
        background: var(--color-bg-dark-secondary);
    }

    /* Show mobile logo */
    .login-logo-mobile {
        display: block;
    }

    .login-card {
        padding: var(--spacing-2xl) var(--spacing-xl);
        border-radius: var(--radius-xl);
    }

    .login-title {
        font-size: 32px;
    }

    .login-subtitle {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .login-page {
        padding: 0;
    }

    .login-form-side {
        padding: var(--spacing-lg);
    }

    .login-card {
        padding: var(--spacing-xl) var(--spacing-lg);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-lg);
    }

    .login-title {
        font-size: 28px;
    }

    .login-subtitle {
        font-size: 14px;
    }
}

/* ========== ACCESSIBILITY ========== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
.form-input:focus-visible,
.btn-login:focus-visible,
.password-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .login-card {
        border: 2px solid var(--color-text-primary);
        background: var(--color-bg-primary);
    }

    .form-input {
        border-width: 3px;
        background: var(--color-bg-primary);
    }
}