/*
 * THEME: Corporate Navy - Sophisticated Corporate Theme
 * Description: A sophisticated corporate theme for French finance or law firms
 * Palette: Deep Navy (#002366), Bordeaux Red (#800020), and Silver
 * Typography: Professional serif (Playfair Display) paired with clean Helvetica
 * Design: High-end shadows, subtle pinstripe background patterns, and data-driven visuals
 * Layout: Authoritative, grid-based, with a focus on trust and expertise
 */

/* ============================================
   COLOR SCHEME - CORPORATE NAVY
   ============================================ */

:root {
    /* Primary Colors */
    --corporate-navy: #002366;
    --corporate-navy-dark: #001a4d;
    --corporate-navy-light: #003399;

    /* Accent Colors */
    --bordeaux-red: #800020;
    --bordeaux-red-light: #a02040;
    --silver: #c0c0c0;
    --silver-light: #e8e8e8;
    --silver-dark: #a0a0a0;

    /* Light Mode Colors */
    --primary-light: #1d3557;
    --secondary-light: #457b9d;
    --accent-light: #a8dadc;
    --neutral-light: #f1faee;
    --bg-light: #ffffff;
    --text-light: #1a1a1a;

    /* Dark Mode Colors */
    --primary-dark: #0a1929;
    --secondary-dark: #1e3a5f;
    --accent-dark: #2d5a87;
    --neutral-dark: #1a1a2e;
    --bg-dark: #0d1117;
    --text-dark: #e6edf3;

    /* Semantic Colors */
    --success: #28a745;
    --warning: #ffc107;
    --error: #dc3545;
    --info: #17a2b8;

    /* Typography */
    --font-primary: 'Montserrat', 'Helvetica Neue', Arial, sans-serif;
    --font-secondary: 'Lato', 'Helvetica Neue', Arial, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   CSS CUSTOM PROPERTIES - LIGHT MODE
   ============================================ */

[data-theme="light"] {
    --color-primary: var(--primary-light);
    --color-secondary: var(--secondary-light);
    --color-accent: var(--accent-light);
    --color-neutral: var(--neutral-light);
    --color-background: var(--bg-light);
    --color-text: var(--text-light);
    --color-text-muted: #6c757d;
    --color-border: #dee2e6;
    --color-surface: #ffffff;
    --color-surface-elevated: #ffffff;
    --color-on-primary: #ffffff;
    --color-on-secondary: #ffffff;
    --color-on-accent: #1a1a1a;
    --color-on-background: var(--text-light);
    --color-on-surface: var(--text-light);
    --header-bg: var(--corporate-navy);
    --header-text: #ffffff;
    --footer-bg: var(--corporate-navy-dark);
    --footer-text: #ffffff;
}

/* ============================================
   CSS CUSTOM PROPERTIES - DARK MODE
   ============================================ */

[data-theme="dark"] {
    --color-primary: var(--primary-dark);
    --color-secondary: var(--secondary-dark);
    --color-accent: var(--accent-dark);
    --color-neutral: var(--neutral-dark);
    --color-background: var(--bg-dark);
    --color-text: var(--text-dark);
    --color-text-muted: #8b949e;
    --color-border: #30363d;
    --color-surface: #161b22;
    --color-surface-elevated: #1c2128;
    --color-on-primary: #ffffff;
    --color-on-secondary: #ffffff;
    --color-on-accent: #ffffff;
    --color-on-background: var(--text-dark);
    --color-on-surface: var(--text-dark);
    --header-bg: var(--corporate-navy-dark);
    --header-text: #ffffff;
    --footer-bg: #000d1a;
    --footer-text: #e6edf3;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-secondary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

/* Pinstripe Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: repeating-linear-gradient(
        90deg,
        transparent,
        transparent 2px,
        rgba(0, 35, 102, 0.02) 2px,
        rgba(0, 35, 102, 0.02) 4px
    );
    pointer-events: none;
    z-index: -1;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

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

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h4 {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
}

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

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

a:hover {
    color: var(--color-accent);
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.focus-visible:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.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(220px, 1fr));
}

@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--header-bg);
    color: var(--header-text);
    box-shadow: var(--shadow-lg);
    transition: background-color var(--transition-normal);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: var(--header-text);
}

.header__logo-img {
    width: auto;
    height: 60px;
    object-fit: contain;
}

.header__logo-text {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.header__nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.header__nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
    padding: 0;
}

.header__nav-item {
    position: relative;
}

.header__nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--header-text);
    font-weight: 500;
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
}

.header__nav-link:hover,
.header__nav-link:focus {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--silver-light);
}

.header__nav-link--active {
    color: var(--silver-light);
    background-color: rgba(255, 255, 255, 0.15);
}

/* Dropdown Menu */
.header__nav-item--dropdown {
    position: relative;
}

.header__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background-color: var(--color-surface);
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    z-index: 100;
}

.header__nav-item--dropdown:hover .header__dropdown,
.header__nav-item--dropdown:focus-within .header__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.header__dropdown-list {
    list-style: none;
    padding: var(--spacing-sm);
    margin: 0;
}

.header__dropdown-item {
    border-bottom: 1px solid var(--color-border);
}

.header__dropdown-item:last-child {
    border-bottom: none;
}

.header__dropdown-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    font-weight: 500;
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
}

.header__dropdown-link:hover,
.header__dropdown-link:focus {
    background-color: var(--color-neutral);
    color: var(--color-primary);
}

/* Theme Switcher */
.header__theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background-color: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--header-text);
}

.header__theme-toggle:hover,
.header__theme-toggle:focus {
    background-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.header__theme-toggle .material-symbols-rounded {
    font-size: 24px;
}

/* Mobile Menu Toggle */
.header__menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.header__menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--header-text);
    transition: all var(--transition-normal);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero__media {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero__media::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 35, 102, 0.5);
}

.hero__img,
.hero__video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: blur(3px);
}

.hero__content {
    position: relative;
    z-index: 1;
    padding: var(--spacing-xl);
    max-width: 900px;
}

.hero__title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    color: #ffffff;
    margin-bottom: var(--spacing-lg);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero__subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--silver-light);
    margin-bottom: var(--spacing-xl);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

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

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

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

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    background-color: var(--corporate-navy-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--secondary {
    background-color: var(--color-secondary);
    color: var(--color-on-secondary);
    box-shadow: var(--shadow-md);
}

.btn--secondary:hover {
    background-color: var(--corporate-navy-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--accent {
    background-color: var(--bordeaux-red);
    color: #ffffff;
    box-shadow: var(--shadow-md);
}

.btn--accent:hover {
    background-color: var(--bordeaux-red-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--outline {
    background-color: transparent;
    color: #ffffff;
    border: 2px solid #ffffff;
}

.btn--outline:hover {
    background-color: #ffffff;
    color: var(--corporate-navy);
}

.btn--lg {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: 1.125rem;
}

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

/* ============================================
   CARDS
   ============================================ */

.card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card__content {
    padding: var(--spacing-lg);
}

.card__title {
    font-family: var(--font-primary);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

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

.card__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

/* ============================================
   SECTIONS WITH BACKGROUND
   ============================================ */

.section--with-bg {
    position: relative;
    background-color: var(--color-neutral);
    overflow: hidden;
}

.section--with-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: blur(3px);
    z-index: 0;
}

.section--with-bg > .container {
    position: relative;
    z-index: 1;
}

.section--navy {
    background-color: var(--corporate-navy);
    color: #ffffff;
}

.section--navy h1,
.section--navy h2,
.section--navy h3,
.section--navy h4,
.section--navy h5,
.section--navy h6 {
    color: #ffffff;
}

.section--navy .card {
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--color-text);
}

/* ============================================
   FORMS
   ============================================ */

.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form__label {
    font-weight: 600;
    color: var(--color-primary);
}

.form__input,
.form__textarea,
.form__select {
    padding: var(--spacing-md);
    font-family: var(--font-secondary);
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-surface);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(29, 53, 87, 0.1);
}

.form__textarea {
    min-height: 150px;
    resize: vertical;
}

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

.form__checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

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

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer__container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer__section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer__title {
    font-family: var(--font-primary);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--silver-light);
    margin-bottom: var(--spacing-sm);
}

.footer__text {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

.footer__link {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--silver-light);
}

.footer__contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.8);
}

.footer__contact-item .material-symbols-rounded {
    color: var(--silver-light);
}

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

.footer__copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.footer__legal-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer__legal-link {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer__legal-link:hover {
    color: var(--silver-light);
}

/* ============================================
   ICONS
   ============================================ */

.material-symbols-rounded {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    font-size: 24px;
    line-height: 1;
}

.icon--sm {
    font-size: 18px;
}

.icon--lg {
    font-size: 32px;
}

.icon--xl {
    font-size: 48px;
}

/* ============================================
   UTILITIES
   ============================================ */

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

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

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

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

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

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    .header__nav {
        gap: var(--spacing-md);
    }

    .header__nav-list {
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .header__menu-toggle {
        display: flex;
    }

    .header__nav {
        position: fixed;
        top: 72px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 72px);
        background-color: var(--header-bg);
        flex-direction: column;
        padding: var(--spacing-lg);
        transition: left var(--transition-normal);
        overflow-y: auto;
    }

    .header__nav--active {
        left: 0;
    }

    .header__nav-list {
        flex-direction: column;
        width: 100%;
    }

    .header__dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background-color: rgba(255, 255, 255, 0.05);
    }

    .hero__title {
        font-size: 2rem;
    }

    .hero__subtitle {
        font-size: 1.125rem;
    }

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

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero__actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .header,
    .footer,
    .btn,
    .hero__actions {
        display: none;
    }

    body {
        background-color: #ffffff;
        color: #000000;
    }

    .section {
        page-break-inside: avoid;
    }
}