/**
 * Helsinki Salsa Academy - Main Stylesheet
 */

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

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--color-gray-800);
    background-color: var(--color-white);
    overflow-x: hidden;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-3) var(--space-6);
    background: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    border-radius: var(--radius-md);
    z-index: var(--z-tooltip);
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: var(--space-4);
}

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

.container {
    width: 100%;
    max-width: var(--container-xl);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

@media (min-width: 768px) {
    .container {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding-left: var(--space-8);
        padding-right: var(--space-8);
    }
}

.main-content {
    min-height: calc(100vh - var(--header-height));
    padding-top: var(--header-height);
}

/* ==========================================
   HEADER
   ========================================== */

/* ==========================================
   HEADER
   ========================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: var(--z-fixed);
    transition: all var(--transition-base);
}

.header-level-1 {
    height: 70px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-level-2 {
    height: 40px;
    background: var(--color-gray-50);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.header-level-2 .header-inner {
    justify-content: center;
}

/* Logo */
.site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--color-primary);
}

.logo-image {
    height: 44px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-hsa {
    font-family: var(--font-heading);
    font-weight: var(--font-bold);
    font-size: var(--text-lg);
    letter-spacing: var(--tracking-tight);
}

.logo-full {
    font-size: 10px;
    font-weight: var(--font-medium);
    color: var(--color-gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Navigation Base */
.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
}

.nav-item {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: 13px;
    font-weight: var(--font-bold);
    color: var(--color-primary);
    text-decoration: none;
    background: none;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    transition: all var(--transition-fast);
}

.header-level-2 .nav-link {
    font-size: 11px;
    font-weight: var(--font-semibold);
    color: var(--color-gray-600);
}

.nav-link:hover {
    color: var(--color-accent);
}

.nav-link-highlight {
    color: var(--color-accent) !important;
}

.nav-arrow {
    font-size: 10px;
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-white);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--transition-base);
    min-width: 240px;
    padding: var(--space-2) 0;
    z-index: var(--z-dropdown);
    border-top: 2px solid var(--color-primary);
}

.header-level-2 .dropdown-menu {
    left: 50%;
    transform: translateX(-50%) translateY(10px);
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(0) translateY(0);
}

.header-level-2 .nav-item:hover .dropdown-menu {
    transform: translateX(-50%) translateY(0);
}

.dropdown-list {
    list-style: none;
}

.dropdown-list li a {
    display: block;
    padding: var(--space-3) var(--space-6);
    font-size: 12px;
    font-weight: var(--font-semibold);
    color: var(--color-gray-700);
    text-decoration: none;
    text-transform: uppercase;
    transition: all var(--transition-fast);
}

.dropdown-list li a:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
    padding-left: var(--space-8);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

@media (min-width: 1024px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--color-gray-800);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

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

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

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

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

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

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

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

.btn-ghost {
    color: var(--color-gray-700);
    background: transparent;
}

.btn-ghost:hover:not(:disabled) {
    color: var(--color-primary);
    background: rgba(var(--color-primary-rgb), 0.05);
}

.btn-glow {
    box-shadow: var(--shadow-md), var(--glow-primary);
}

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

.btn-xl {
    padding: var(--space-5) var(--space-10);
    font-size: var(--text-lg);
}

.btn-block {
    width: 100%;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--color-gray-900);
}

h1 {
    font-size: var(--text-5xl);
}

h2 {
    font-size: var(--text-4xl);
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

@media (min-width: 768px) {
    h1 {
        font-size: var(--text-6xl);
    }

    h2 {
        font-size: var(--text-5xl);
    }

    h3 {
        font-size: var(--text-4xl);
    }
}

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

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

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

/* ==========================================
   SECTION STYLES
   ========================================== */

.section {
    padding: var(--space-16) 0;
}

@media (min-width: 768px) {
    .section {
        padding: var(--space-24) 0;
    }
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-12);
}

.section-overline {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: var(--tracking-widest);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.section-title {
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray-600);
    line-height: var(--leading-relaxed);
}

/* Dark Section */
.section-dark {
    background: var(--gradient-primary);
    color: var(--color-white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4,
.section-dark h5,
.section-dark h6 {
    color: var(--color-white);
}

.section-dark .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

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

.site-footer {
    background: var(--gradient-dark);
    color: var(--color-gray-300);
}

.footer-main {
    padding: var(--space-16) 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
}

@media (min-width: 1024px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }
}

.footer-brand {
    max-width: 320px;
}

.footer-logo img {
    height: 56px;
    width: auto;
    margin-bottom: var(--space-6);
}

.footer-tagline {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-gray-400);
    margin-bottom: var(--space-6);
}

.footer-social {
    display: flex;
    gap: var(--space-4);
}

/* Flat Navigation */
.footer-nav-section {
    flex: 1;
    display: flex;
    justify-content: center;
}

.footer-nav-flat {
    width: 100%;
    max-width: 400px;
}

.footer-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
}

@media (min-width: 1024px) {
    .footer-nav-list {
        text-align: left;
    }
}

.footer-nav-list li a {
    font-size: 14px;
    font-weight: var(--font-bold);
    color: var(--color-gray-300);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
}

.footer-nav-list li a:hover {
    color: var(--color-white);
}

.footer-contact-info {
    text-align: center;
}

@media (min-width: 1024px) {
    .footer-contact-info {
        text-align: right;
    }
}

.footer-address {
    font-style: normal;
    font-size: var(--text-sm);
}

.footer-address p {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

@media (min-width: 1024px) {
    .footer-address p {
        justify-content: flex-end;
    }
}

.footer-bottom {
    padding: var(--space-8) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
    text-align: center;
}

@media (min-width: 1024px) {
    .footer-bottom-inner {
        flex-direction: row;
        justify-content: space-between;
    }
}

.copyright {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
    margin: 0;
}

.developer-credit {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
}

.developer-credit a {
    color: var(--color-gray-400);
    font-weight: var(--font-semibold);
    text-decoration: none;
}

.developer-credit a:hover {
    color: var(--color-white);
}

.payment-methods {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.payment-methods img {
    height: 20px;
    width: auto;
    filter: grayscale(1) opacity(0.5);
    transition: all var(--transition-fast);
}

.payment-methods img:hover {
    filter: grayscale(0) opacity(1);
}

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

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

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

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

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

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

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

.text-muted {
    color: var(--color-gray-600);
}

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

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

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

.bg-light {
    background: var(--color-gray-100);
}

.hidden {
    display: none !important;
}

.visible {
    visibility: visible !important;
}

.invisible {
    visibility: hidden !important;
}

.mt-auto {
    margin-top: auto;
}

.mb-auto {
    margin-bottom: auto;
}

.ml-auto {
    margin-left: auto;
}

.mr-auto {
    margin-right: auto;
}

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

@media print {

    .site-header,
    .site-footer,
    .mobile-menu,
    .btn {
        display: none !important;
    }

    .main-content {
        padding-top: 0;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }
}