/* ===================================
   Digital Career Guide - Main Stylesheet
   Brand Colors: Primary Blue #2563EB, Teal #14B8A6
   =================================== */

/* CSS Variables */
:root {
    --color-primary: #2563EB;
    --color-primary-dark: #1d4ed8;
    --color-teal: #14B8A6;
    --color-navy: #0F172A;
    --color-bg: #F8FAFC;
    --color-white: #FFFFFF;
    --color-text: #1E293B;
    --color-text-muted: #64748B;
    --color-border: #E2E8F0;
    --color-success: #15803D;
    --color-error: #DC2626;
    --color-warning: #F59E0B;

    --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

    --container-max: 1200px;
}

/* Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-bg);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

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

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
    margin-bottom: var(--spacing-md);
}

/* Header & Navigation */
.site-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    color: var(--color-navy);
}

.logo:hover {
    color: var(--color-primary);
}

.logo-icon {
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-text strong {
    font-size: 1.125rem;
}

.logo-text small {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 600;
    letter-spacing: 0.05em;
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.toggle-icon {
    width: 24px;
    height: 2px;
    background: var(--color-navy);
    transition: all 0.3s;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.navbar-nav a {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.navbar-actions {
    display: flex;
    gap: var(--spacing-md);
}

.btn-search {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    transition: all 0.2s;
}

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

/* Mobile Navigation */
@media (max-width: 768px) {
    .navbar-toggle {
        display: flex;
    }

    .navbar-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        border-top: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
    }

    .navbar-menu.active {
        display: flex;
    }

    .navbar-nav {
        flex-direction: column;
        width: 100%;
        gap: 0;
    }

    .navbar-nav li {
        width: 100%;
    }

    .navbar-nav a {
        display: block;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
    }

    .navbar-actions {
        width: 100%;
        justify-content: flex-start;
        padding-top: var(--spacing-md);
    }
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-navy) 100%);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.hero h1 {
    color: var(--color-white);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.hero-search {
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.search-form {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--color-white);
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.search-form select {
    padding: var(--spacing-md);
    border: none;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--color-text);
    min-width: 120px;
}

.search-form input[type="text"] {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    font-size: 1rem;
    min-width: 0;
}

.search-form button {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.search-form button:hover {
    background: var(--color-primary-dark);
}

.hero-quick-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.hero-quick-links a {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
    border-radius: var(--radius-md);
    font-weight: 500;
    backdrop-filter: blur(10px);
    transition: all 0.2s;
}

.hero-quick-links a:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    text-decoration: none;
}

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

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

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

/* Cards */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s;
    height: 100%;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.card-text {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

/* Grid Layouts */
.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Sections */
.section {
    padding: var(--spacing-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

/* Job Listings */
.job-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.job-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.job-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.job-company {
    color: var(--color-text-muted);
    font-weight: 500;
}

.job-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.job-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-remote {
    background: #DBEAFE;
    color: #1E40AF;
}

.badge-hybrid {
    background: #FEF3C7;
    color: #92400E;
}

.badge-onsite {
    background: #E0E7FF;
    color: #3730A3;
}

/* Article Cards */
.article-card {
    display: flex;
    flex-direction: column;
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.article-category {
    color: var(--color-teal);
    font-weight: 600;
}

.article-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.article-excerpt {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    flex: 1;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-navy);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-error {
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.alert-success {
    background: #D1FAE5;
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.alert-error {
    background: #FEE2E2;
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

.alert-info {
    background: #DBEAFE;
    color: #1E40AF;
    border: 1px solid #1E40AF;
}

/* Pagination */
.pagination {
    margin: var(--spacing-xl) 0;
}

.pagination-list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    list-style: none;
}

.pagination-list a,
.pagination-current,
.pagination-ellipsis {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    min-width: 40px;
    text-align: center;
}

.pagination-list a {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    transition: all 0.2s;
}

.pagination-list a:hover {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.pagination-current {
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
}

.pagination-ellipsis {
    color: var(--color-text-muted);
}

/* Footer */
.site-footer {
    background: var(--color-navy);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-title {
    color: var(--color-white);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.footer-desc {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.footer-contact {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-contact a {
    color: var(--color-teal);
}

.footer-heading {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--color-teal);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-bottom a {
    color: var(--color-teal);
}

/* Utilities */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-xl); }

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-muted);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-lg);
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }

    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }

    .search-form {
        flex-direction: column;
    }

    .search-form select {
        width: 100%;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .section {
        padding: var(--spacing-xl) 0;
    }
}

/* Icon helper */
.icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
}