/* ============================================================
   DESIGN SYSTEM - CER Technologies Job Board
   Variables CSS, utilidades y componentes base
   Archivo: assets/css/design-system.css
   ============================================================ */

:root {
    /* === COLORES PRIMARIOS === */
    --color-primary: #0073e6;
    --color-primary-dark: #005bb5;
    --color-primary-light: #3d96ff;
    --color-primary-lighter: #e6f3ff;

    /* === COLORES NEUTRALES === */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* === COLORES SEMÁNTICOS === */
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-danger: #dc2626;
    --color-danger-light: #fee2e2;
    --color-info: #3b82f6;
    --color-info-light: #dbeafe;

    /* === TIPOGRAFÍA === */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;

    /* === TAMAÑOS DE FUENTE === */
    --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 */

    /* === PESOS DE FUENTE === */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;

    /* === ESPACIADO === */
    --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 */

    /* === BORDES === */
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;

    /* === SOMBRAS === */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-focus: 0 0 0 3px rgba(0, 115, 230, 0.1);

    /* === TRANSICIONES === */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* === Z-INDEX === */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* === RESET GLOBAL === */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
    margin: 0;
    padding: 0;
}

/* === TIPOGRAFÍA === */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-bold);
    line-height: 1.25;
    margin-top: 0;
}

p {
    margin-top: 0;
    margin-bottom: var(--space-4);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* === UTILIDADES === */
.container-custom {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-light { font-weight: var(--font-light); }
.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }
.font-extrabold { font-weight: var(--font-extrabold); }

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

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.animate-fade-in {
    animation: fadeIn var(--transition-base) ease-out;
}

.animate-slide-up {
    animation: slideUp var(--transition-slow) ease-out;
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* === COMPONENTES BASE === */
.card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--space-6);
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    line-height: 1;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-gray-200);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--color-primary);
    color: white;
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

/* === BADGES === */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background: var(--color-primary-lighter);
    color: var(--color-primary-dark);
}

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

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

.badge-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.badge-gray {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

/* === INPUTS === */
.input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    font-family: inherit;
    color: var(--color-gray-800);
    background: white;
    transition: all var(--transition-base);
}

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

.input::placeholder {
    color: var(--color-gray-400);
}

.input:disabled {
    background: var(--color-gray-50);
    cursor: not-allowed;
}

.select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-4) center;
    padding-right: var(--space-12);
}

/* === SKELETON LOADERS === */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-gray-100) 0px,
        var(--color-gray-200) 40px,
        var(--color-gray-100) 80px
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
    border-radius: var(--radius-md);
}

.skeleton-text {
    height: 1rem;
    margin-bottom: var(--space-2);
}

.skeleton-title {
    height: 1.5rem;
    margin-bottom: var(--space-4);
}

.skeleton-circle {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    :root {
        --text-4xl: 2rem;
        --text-3xl: 1.5rem;
        --text-2xl: 1.25rem;
    }
}

/* === UTILIDADES DE ESPACIADO === */
.m-0 { margin: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* === UTILIDADES DE DISPLAY === */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }
.d-inline-flex { display: inline-flex; }

.flex-row { flex-direction: row; }
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* === UTILIDADES DE OVERFLOW === */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-hidden { overflow-x: hidden; }
.overflow-y-auto { overflow-y: auto; }

/* === PRINT STYLES === */
@media print {
    .no-print {
        display: none !important;
    }
}