/**
 * TinkuRani.com — Core Layout, Typography, Header, Footer & Base Styles
 */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 24px);
    background-color: var(--bg-main);
    color: var(--text-main);
    -webkit-text-size-adjust: 100%;
}

body.site-body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.nav-open {
    overflow: hidden;
}

.site-main {
    flex: 1 0 auto;
    position: relative;
    z-index: 2;
}

/* Ambient Background Glow Effects */
.ambient-glow {
    position: fixed;
    pointer-events: none;
    z-index: 0;
    filter: blur(120px);
    opacity: 0.32;
    border-radius: 50%;
}

.ambient-glow--top {
    width: 540px;
    height: 540px;
    top: -180px;
    right: -120px;
    background: radial-gradient(circle, var(--accent-primary) 0%, var(--accent-secondary) 55%, transparent 75%);
}

.ambient-glow--bottom {
    width: 480px;
    height: 480px;
    bottom: -160px;
    left: -140px;
    background: radial-gradient(circle, var(--accent-highlight) 0%, var(--accent-primary) 60%, transparent 75%);
    opacity: 0.2;
}

/* Accessibility Skip Link */
.skip-to-content {
    position: fixed;
    top: -100px;
    left: 16px;
    z-index: 9999;
    padding: 10px 18px;
    background: var(--accent-primary);
    color: var(--text-main);
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: top var(--transition-fast);
}

.skip-to-content:focus {
    top: 16px;
    outline: 2px solid var(--accent-highlight);
    outline-offset: 2px;
}

/* Focus Visible Accessibility */
:focus-visible {
    outline: 2px solid var(--accent-highlight);
    outline-offset: 3px;
}

/* Base Elements */
img,
svg {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul,
ol {
    list-style: none;
}

/* Typography System */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    color: var(--text-main);
    line-height: 1.22;
    letter-spacing: -0.02em;
    font-weight: 700;
}

.heading-xl {
    font-size: clamp(2.15rem, 4.4vw, 3.6rem);
    font-weight: 800;
    line-height: 1.14;
}

.heading-lg {
    font-size: clamp(1.75rem, 3.2vw, 2.65rem);
    font-weight: 700;
}

.heading-md {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    font-weight: 600;
}

.heading-sm {
    font-size: 1.125rem;
    font-weight: 600;
}

.text-gradient {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline;
}

.text-lead {
    font-size: clamp(1.02rem, 1.3vw, 1.15rem);
    color: var(--text-secondary);
    line-height: 1.72;
}

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

/* Containers & Sections */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: 1.5rem;
}

.container--narrow {
    max-width: var(--container-narrow);
}

.section {
    padding-block: var(--section-py);
    position: relative;
}

.section--alt {
    background-color: rgba(16, 22, 37, 0.65);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.section-header {
    max-width: 700px;
    margin-inline: auto;
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-header--left {
    margin-inline: 0;
    text-align: left;
}

.section-header p {
    margin-top: 0.9rem;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* ======================================================================
   GLOBAL HEADER & NAVIGATION
   ====================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    background-color: transparent;
    border-bottom: 1px solid transparent;
    transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
}

.site-header.is-scrolled {
    background-color: var(--bg-header-scroll);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom-color: var(--border-subtle);
    box-shadow: var(--shadow-md);
}

.header-container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

/* Brand Logo */
.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-main);
    position: relative;
    z-index: 1002;
}

.brand-logo__img {
    width: var(--brand-logo-size, 56px);
    height: var(--brand-logo-size, 56px);
    object-fit: contain;
    flex-shrink: 0;
    filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.34));
    transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-logo__img {
    transform: scale(1.06) rotate(-3deg);
}

.brand-logo__accent {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Navigation Links */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 0.9rem;
    font-size: 0.94rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-main);
    background-color: rgba(255, 255, 255, 0.04);
}

.nav-link.is-active {
    color: var(--text-main);
    font-weight: 600;
}

.nav-link.is-active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0.9rem;
    right: 0.9rem;
    height: 2px;
    border-radius: 2px;
    background: var(--gradient-brand);
}

.nav-mobile-cta {
    display: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

/* ======================================================================
   STYLISH LIGHT / DARK THEME TOGGLE SWITCH
   ====================================================================== */
.theme-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1002;
}

.theme-toggle__track {
    position: relative;
    width: 66px;
    height: 36px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, rgba(21, 28, 46, 0.92), rgba(16, 22, 37, 0.92));
    border: 1px solid rgba(99, 102, 241, 0.35);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.35), 0 4px 14px rgba(99, 102, 241, 0.15);
    transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.theme-toggle:hover .theme-toggle__track {
    border-color: var(--accent-primary);
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.35), 0 0 16px rgba(99, 102, 241, 0.35);
}

.theme-toggle__icon {
    position: relative;
    z-index: 2;
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-base), transform var(--transition-base), opacity var(--transition-base);
}

.theme-toggle__icon--sun {
    color: #F59E0B;
    opacity: 0.55;
    transform: scale(0.88);
}

.theme-toggle__icon--moon {
    color: #FFFFFF;
    opacity: 1;
    transform: scale(1);
}

.theme-toggle__thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gradient-primary);
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.55);
    transform: translateX(30px);
    transition: transform 0.36s cubic-bezier(0.34, 1.56, 0.64, 1), background var(--transition-base), box-shadow var(--transition-base);
    z-index: 1;
}

/* Light Mode Active State for Toggle Switch */
html[data-theme="light"] .theme-toggle__track {
    background: linear-gradient(135deg, #EEF2FF 0%, #E0F2FE 100%);
    border-color: rgba(99, 102, 241, 0.32);
    box-shadow: inset 0 2px 5px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(99, 102, 241, 0.14);
}

html[data-theme="light"] .theme-toggle__thumb {
    transform: translateX(0);
    background: linear-gradient(135deg, #F59E0B 0%, #EA580C 100%);
    box-shadow: 0 3px 10px rgba(245, 158, 11, 0.45);
}

html[data-theme="light"] .theme-toggle__icon--sun {
    color: #FFFFFF;
    opacity: 1;
    transform: scale(1) rotate(25deg);
}

html[data-theme="light"] .theme-toggle__icon--moon {
    color: #6366F1;
    opacity: 0.6;
    transform: scale(0.88);
}

/* Light Mode Component Refinements */
html[data-theme="light"] .section--alt {
    background-color: rgba(238, 242, 249, 0.75);
}

html[data-theme="light"] .ambient-glow {
    opacity: 0.14;
}

html[data-theme="light"] .btn--secondary {
    background: rgba(255, 255, 255, 0.85);
    border-color: rgba(15, 23, 42, 0.14);
    color: var(--text-main);
}

html[data-theme="light"] .btn--secondary:hover {
    background: #FFFFFF;
    border-color: var(--accent-primary);
}

html[data-theme="light"] .eyebrow {
    background: rgba(99, 102, 241, 0.1);
    color: #4F46E5;
    border-color: rgba(99, 102, 241, 0.25);
}

html[data-theme="light"] .card__badge {
    background: rgba(6, 182, 212, 0.12);
    color: #0891B2;
}

html[data-theme="light"] .card__icon {
    color: #4F46E5;
}

html[data-theme="light"] .card__link {
    color: #4F46E5;
}

html[data-theme="light"] .hero-visual-frame {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(238, 242, 249, 0.85));
}

html[data-theme="light"] .hero-floating-card {
    background: rgba(255, 255, 255, 0.94);
    border-color: rgba(15, 23, 42, 0.1);
}

html[data-theme="light"] .cta-box {
    background: linear-gradient(135deg, #FFFFFF 0%, #EEF2FF 100%);
    border-color: rgba(99, 102, 241, 0.28);
}

html[data-theme="light"] .form-control {
    background-color: #F8FAFC;
    border-color: rgba(15, 23, 42, 0.15);
    color: var(--text-main);
}

html[data-theme="light"] .tech-tag {
    background: #F1F5F9;
    border-color: rgba(15, 23, 42, 0.14);
    color: #1E293B;
}

/* Light Mode High-Contrast Alerts, Channels, Icons & Badges */
html[data-theme="light"] .alert-banner--sent {
    background: #ECFDF5;
    border-color: #10B981;
    color: #065F46;
}

html[data-theme="light"] .alert-banner--setup_required {
    background: #FFFBEB;
    border-color: #F59E0B;
    color: #92400E;
}

html[data-theme="light"] .alert-banner--error,
html[data-theme="light"] .alert-banner--validation_error {
    background: #FEF2F2;
    border-color: #EF4444;
    color: #991B1B;
}

html[data-theme="light"] .contact-channel {
    background: #F8FAFC;
    border-color: rgba(15, 23, 42, 0.14);
}

html[data-theme="light"] a.contact-channel:hover {
    background: #FFFFFF;
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-sm);
}

html[data-theme="light"] .contact-channel__icon {
    background: rgba(79, 70, 229, 0.14);
    color: #4338CA;
}

html[data-theme="light"] .btn--whatsapp {
    background: #DCFCE7;
    border-color: #16A34A;
    color: #15803D;
}

html[data-theme="light"] .btn--whatsapp:hover {
    background: #BBF7D0;
    border-color: #15803D;
    color: #14532D;
}

html[data-theme="light"] .footer-availability {
    background: #ECFDF5;
    border-color: #10B981;
    color: #047857;
}

/* Mobile Hamburger Toggle */
.mobile-nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1002;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.mobile-nav-toggle:hover {
    border-color: var(--border-hover);
}

.hamburger-box {
    width: 20px;
    height: 14px;
    position: relative;
    display: inline-block;
}

.hamburger-line {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background-color: var(--text-main);
    transition: transform var(--transition-base), opacity var(--transition-fast);
}

.hamburger-line--1 { top: 0; }
.hamburger-line--2 { top: 6px; }
.hamburger-line--3 { top: 12px; }

.mobile-nav-toggle[aria-expanded="true"] .hamburger-line--1 {
    transform: translateY(6px) rotate(45deg);
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-line--2 {
    opacity: 0;
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-line--3 {
    transform: translateY(-6px) rotate(-45deg);
}

.mobile-nav-backdrop {
    display: none;
}

/* ======================================================================
   GLOBAL FOOTER
   ====================================================================== */
.site-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    padding-top: 4.5rem;
    padding-bottom: 2rem;
    position: relative;
    z-index: 2;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.45fr 0.85fr 1fr 1.25fr;
    gap: 2.5rem;
    padding-bottom: 3.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.footer-logo {
    margin-bottom: 1rem;
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.93rem;
    line-height: 1.68;
    margin-bottom: 1.25rem;
    max-width: 340px;
}

.footer-availability {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.4rem 0.85rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.25);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: #34D399;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-success);
    box-shadow: 0 0 8px var(--color-success);
}

.footer-socials {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin-top: 1.25rem;
}

.social-icon-link {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-icon-link:hover {
    color: var(--text-main);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.footer-heading {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 1.2rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.92rem;
    transition: color var(--transition-fast), transform var(--transition-fast);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--accent-highlight);
    transform: translateX(3px);
}

.footer-contact-note {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.footer-contact-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.footer-contact-item {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

a.footer-contact-item:hover {
    color: var(--text-main);
}

.footer-contact-icon {
    color: var(--accent-primary);
    display: inline-flex;
    flex-shrink: 0;
}

.footer-bottom {
    padding-top: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer-legal-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.footer-legal-links a:hover {
    color: var(--text-main);
}