/* ============================================
   COLOR SYSTEM - HỆ THỐNG MÀU SẮC
   Sử dụng: var(--tên-biến)
   ============================================ */

:root {
    /* ============================================
       PRIMARY COLORS - MÀU CHỦ ĐẠO
       ============================================ */
    --primary: #0891b2; /* Cyan chủ đạo */
    --primary-dark: #0e7490; /* Cyan đậm (hover) */
    --primary-light: #06b6d4; /* Cyan nhạt */
    --primary-lighter: #f0f9ff; /* Cyan rất nhạt (background) */
    /* ============================================
       SECONDARY COLORS - MÀU PHỤ (TẾT THEME)
       ============================================ */
    --secondary: #f5d547; /* Vàng Tết chính */
    --secondary-dark: #e8b54d; /* Vàng đậm */
    --secondary-darker: #daa855; /* Vàng đậm hơn */
    --secondary-darkest: #cd9b5d; /* Vàng rất đậm */
    --secondary-gold: #c08e65; /* Vàng kim */
    /* ============================================
       ACCENT COLORS - MÀU NHẤN
       ============================================ */
    --accent-red: #da251d; /* Đỏ cờ Việt Nam */
    --accent-yellow: #ffff00; /* Vàng cờ Việt Nam */
    --accent-orange: #f97316; /* Cam */
    --accent-pink: #ec4899; /* Hồng */
    /* ============================================
       NEUTRAL COLORS - MÀU TRUNG TÍNH (GRAY SCALE)
       ============================================ */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    /* ============================================
       TEXT COLORS - MÀU CHỮ
       ============================================ */
    --text-primary: var(--gray-900); /* Chữ chính đậm */
    --text-secondary: var(--gray-700); /* Chữ phụ */
    --text-tertiary: var(--gray-500); /* Chữ mờ */
    --text-placeholder: var(--gray-400); /* Placeholder */
    --text-disabled: var(--gray-300); /* Disabled */
    --text-inverse: #ffffff; /* Chữ trắng */
    /* ============================================
       BACKGROUND COLORS - MÀU NỀN
       ============================================ */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    --bg-dark: var(--gray-900);
    /* Gradient backgrounds */
    --bg-gradient-tet: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 25%, var(--secondary-darker) 50%, var(--secondary-darkest) 75%, var(--secondary-gold) 100%);
    --bg-gradient-primary: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    /* ============================================
       BORDER COLORS - MÀU VIỀN
       ============================================ */
    --border-light: var(--gray-200);
    --border-medium: var(--gray-300);
    --border-dark: var(--gray-400);
    --border-primary: var(--primary);
    /* ============================================
       SEMANTIC COLORS - MÀU NGỮ NGHĨA
       ============================================ */
    /* Success */
    --success: #10b981;
    --success-dark: #059669;
    --success-light: #d1fae5;
    /* Warning */
    --warning: #f59e0b;
    --warning-dark: #d97706;
    --warning-light: #fef3c7;
    /* Error */
    --error: #ef4444;
    --error-dark: #dc2626;
    --error-light: #fee2e2;
    /* Info */
    --info: #3b82f6;
    --info-dark: #2563eb;
    --info-light: #dbeafe;
    /* ============================================
       SHADOW COLORS - MÀU SHADOW
       ============================================ */
    --shadow-sm: 0 0.0625rem 0.125rem rgba(0, 0, 0, 0.05);
    --shadow-md: 0 0.25rem 0.375rem -0.0625rem rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 0.625rem 0.9375rem -0.1875rem rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 1.25rem 1.5625rem -0.3125rem rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 1.5625rem 3.125rem -0.75rem rgba(0, 0, 0, 0.25);
    /* Colored shadows */
    --shadow-primary: 0 0.25rem 0.75rem rgba(8, 145, 178, 0.3);
    --shadow-primary-lg: 0 0.5rem 1rem rgba(8, 145, 178, 0.4);
    /* ============================================
       OVERLAY COLORS - MÀU OVERLAY
       ============================================ */
    --overlay-light: rgba(255, 255, 255, 0.1);
    --overlay-medium: rgba(255, 255, 255, 0.2);
    --overlay-heavy: rgba(255, 255, 255, 0.3);
    --overlay-dark: rgba(0, 0, 0, 0.5);
    /* ============================================
       OPACITY VALUES
       ============================================ */
    --opacity-disabled: 0.5;
    --opacity-hover: 0.8;
    --opacity-subtle: 0.6;
    /* ============================================
       TRANSITION & ANIMATION
       ============================================ */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-cubic: cubic-bezier(0.4, 0, 0.2, 1);
    /* ============================================
       SPACING SCALE (REM)
       ============================================ */
    --space-0: 0;
    --space-1: 0.25rem; /* 4px */
    --space-2: 0.5rem; /* 8px */
    --space-3: 0.75rem; /* 12px */
    --space-4: 1rem; /* 16px */
    --space-5: 1.25rem; /* 20px */
    --space-6: 1.5rem; /* 24px */
    --space-8: 2rem; /* 32px */
    --space-10: 2.5rem; /* 40px */
    --space-12: 3rem; /* 48px */
    --space-16: 4rem; /* 64px */
    --space-20: 5rem; /* 80px */
    /* ============================================
       BORDER RADIUS
       ============================================ */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999rem;
    /* ============================================
       FONT SIZES (REM)
       ============================================ */
    --text-xs: 0.75rem; /* 12px */
    --text-sm: 0.875rem; /* 14px */
    --text-base: 1rem; /* 16px */
    --text-lg: 1.125rem; /* 18px */
    --text-xl: 1.25rem; /* 20px */
    --text-2xl: 1.5rem; /* 24px */
    --text-3xl: 1.875rem; /* 30px */
    --text-4xl: 2.25rem; /* 36px */
    --text-5xl: 3rem; /* 48px */
    --text-6xl: 3.75rem; /* 60px */
    --text-7xl: 4.5rem; /* 72px */
    /* ============================================
       FONT WEIGHTS
       ============================================ */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    /* ============================================
       Z-INDEX LAYERS
       ============================================ */
    --z-base: 1;
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-fixed: 30;
    --z-modal-backdrop: 40;
    --z-modal: 50;
    --z-popover: 60;
    --z-tooltip: 70;
}

/* ============================================
   DARK MODE SUPPORT (Optional)
   ============================================ */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: var(--gray-900);
        --bg-secondary: var(--gray-800);
        --bg-tertiary: var(--gray-700);
        --text-primary: var(--gray-50);
        --text-secondary: var(--gray-300);
        --text-tertiary: var(--gray-400);
        --border-light: var(--gray-700);
        --border-medium: var(--gray-600);
        --border-dark: var(--gray-500);
    }
}


/* ============================================
   BLAZOR CLASSES - LỚP HỆ THỐNG
   ============================================ */
/* FlightBooking Custom Styles - Updated Version */
#blazor-error-ui {
    color-scheme: light only;
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

    #blazor-error-ui\ dismiss {
        cursor: pointer;
        position: absolute;
        right: 0.75rem;
        top: 0.5rem;
    }

/* Chrome, Edge, Safari */
::-webkit-scrollbar {
    display: none;
}

/* Firefox */
html {
    scrollbar-width: none;
}

/* IE / Edge cũ */
body {
    -ms-overflow-style: none;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid #e50000;
}

.validation-message {
    color: #e50000;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* ============================================
   UTILITY CLASSES - LỚP TIỆN ÍCH
   ============================================ */

/* Text colors */
.text-primary {
    color: var(--text-primary);
}

.text-secondary {
    color: var(--text-secondary);
}

.text-tertiary {
    color: var(--text-tertiary);
}

.text-white {
    color: var(--text-inverse);
}

/* Background colors */
.bg-primary {
    background-color: var(--bg-primary);
}

.bg-secondary {
    background-color: var(--bg-secondary);
}

.bg-gradient-tet {
    background: var(--bg-gradient-tet);
}

/* Border colors */
.border-light {
    border-color: var(--border-light);
}

.border-primary {
    border-color: var(--border-primary);
}

/* Semantic colors */
.text-success {
    color: var(--success);
}

.text-warning {
    color: var(--warning);
}

.text-error {
    color: var(--error);
}

.text-info {
    color: var(--info);
}

.bg-success {
    background-color: var(--success-light);
}

.bg-warning {
    background-color: var(--warning-light);
}

.bg-error {
    background-color: var(--error-light);
}

.bg-info {
    background-color: var(--info-light);
}

/* Shadows */
.shadow-sm {
    box-shadow: var(--shadow-sm);
}

.shadow-md {
    box-shadow: var(--shadow-md);
}

.shadow-lg {
    box-shadow: var(--shadow-lg);
}

.shadow-xl {
    box-shadow: var(--shadow-xl);
}

.shadow-primary {
    box-shadow: var(--shadow-primary);
}

/* ============================================
   GLOBAL RESET
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   COMMON STYLES
   ============================================ */
a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

    a:hover {
        color: var(--primary-dark);
    }

button {
    cursor: pointer;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

::selection {
    background-color: var(--primary-light);
    color: var(--text-inverse);
}

::-webkit-scrollbar {
    width: 0.5rem;
    height: 0.5rem;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: var(--radius-full);
}

    ::-webkit-scrollbar-thumb:hover {
        background: var(--gray-500);
    }