@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ============================================================
   CSS VARIABLES
   ============================================================ */
:root {
    --bg-base:        #0b0c10;
    --bg-surface:     #13151A;
    --bg-alt:         #16181D;
    --border:         #1E2028;
    --border-strong:  #252830;
    --text:           #ffffff;
    --text-muted:     #8B8D98;
    --text-secondary: #E4E4E7;
    --accent:         #00d094;
    --accent-hover:   #00b884;
    --nav-bg:         rgba(19,21,26,0.85);
    --shadow:         0 4px 24px rgba(0,0,0,0.4);
}
html.light {
    --bg-base:        #f0f2f5;
    --bg-surface:     #ffffff;
    --bg-alt:         #f8fafc;
    --border:         #e2e8f0;
    --border-strong:  #cbd5e1;
    --text:           #0f172a;
    --text-muted:     #64748b;
    --text-secondary: #1e293b;
    --accent:         #00b884;
    --accent-hover:   #009e72;
    --nav-bg:         rgba(255,255,255,0.9);
    --shadow:         0 4px 24px rgba(0,0,0,0.08);
}

/* ============================================================
   GLOBAL BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-base);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.2s ease;
    position: relative;
}

/* ============================================================
   ANIMATED BACKGROUND GRID
   ============================================================ */
:root { --grid-opacity: 0.7; --grid-pulse-opacity: 0.3; }
html.light { --grid-opacity: 0.5; --grid-pulse-opacity: 0.2; }

.bg-grid {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: -1;
    pointer-events: none;
    background-image: 
        radial-gradient(circle at 1.5px 1.5px, var(--accent) 1.5px, transparent 0);
    background-size: 40px 40px;
    opacity: var(--grid-opacity);
    
    /* Moving Shimmer Mask */
    mask-image: linear-gradient(135deg, 
        rgba(0,0,0,0.1) 0%, 
        rgba(0,0,0,1) 50%, 
        rgba(0,0,0,0.1) 100%);
    -webkit-mask-image: linear-gradient(135deg, 
        rgba(0,0,0,0.1) 0%, 
        rgba(0,0,0,1) 50%, 
        rgba(0,0,0,0.1) 100%);
    mask-size: 400% 400%;
    -webkit-mask-size: 400% 400%;
    
    animation: grid-shimmer 8s linear infinite;
}

html.light .bg-grid {
    background-image: 
        radial-gradient(circle at 1.5px 1.5px, var(--accent) 1.8px, transparent 0);
}

@keyframes grid-shimmer {
    0% { mask-position: 0% 0%; -webkit-mask-position: 0% 0%; }
    100% { mask-position: 133% 133%; -webkit-mask-position: 133% 133%; }
}

/* ============================================================
   OVERRIDE HARDCODED TAILWIND CLASSES FOR THEME
   ============================================================ */
.bg-\[\#0b0c10\], .bg-\[\#0B0C10\] { background-color: var(--bg-base) !important; }
.bg-\[\#13151A\]                    { background-color: var(--bg-surface) !important; }
.bg-\[\#16181D\]                    { background-color: var(--bg-alt) !important; }
.border-\[\#1E2028\]                { border-color: var(--border) !important; }
.border-\[\#252830\]                { border-color: var(--border-strong) !important; }
.text-white                         { color: var(--text) !important; }
.text-\[\#8B8D98\]                  { color: var(--text-muted) !important; }
.text-\[\#E4E4E7\]                  { color: var(--text-secondary) !important; }

html.light input, html.light select, html.light textarea {
    color: var(--text) !important;
    background-color: var(--bg-alt) !important;
}
html.light input::placeholder, html.light textarea::placeholder {
    color: var(--text-muted) !important;
}

/* ============================================================
   HEADER
   ============================================================ */
#site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 1.25rem 1rem;
    transition: background-color 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}
#site-header.scrolled {
    background-color: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}
.header-container {
    max-width: 72rem;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

/* Logo */
.site-logo {
    width: 2rem; height: 2rem;
    border-radius: 50%;
    background: #ffffff;
    color: #000000;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.7rem; letter-spacing: -0.05em;
    text-decoration: none; flex-shrink: 0;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.site-logo:hover { transform: scale(1.08); box-shadow: 0 0 16px rgba(0,208,148,0.3); }
html.light .site-logo { background: #0f172a; color: #fff; }

/* Desktop Nav Pill */
.desktop-nav {
    display: none;
    align-items: center; gap: 1.5rem;
    background-color: var(--nav-bg);
    border: 1px solid var(--border);
    border-radius: 9999px;
    padding: 0.625rem 1.5rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
@media (min-width: 768px) { .desktop-nav { display: flex; } }

.nav-link {
    font-size: 0.875rem; font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}
.nav-link:hover, .nav-link.active { color: var(--text); }

/* Header Actions */
.header-actions {
    display: flex; align-items: center; gap: 0.5rem; flex-shrink: 0;
}

/* Icon Buttons */
.icon-btn {
    width: 2.25rem; height: 2.25rem;
    border-radius: 50%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; color: var(--text-muted); font-size: 1rem;
    text-decoration: none; flex-shrink: 0;
    transition: color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); box-shadow: 0 0 12px rgba(0,208,148,0.2); }
.icon-btn.active { color: var(--accent); border-color: var(--accent); background-color: rgba(0,208,148,0.08); }

/* Theme Toggle */
#theme-toggle .ph-sun  { display: none; }
#theme-toggle .ph-moon { display: block; }
html.light #theme-toggle .ph-sun  { display: block; }
html.light #theme-toggle .ph-moon { display: none; }

/* Menu Toggle Button */
.menu-toggle {
    display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 5px;
    width: 2.25rem; height: 2.25rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 0.5rem; cursor: pointer; padding: 0.5rem;
    transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.3s ease;
}
@media (min-width: 768px) { .menu-toggle { display: none; } }
.menu-toggle:hover { border-color: var(--accent); box-shadow: 0 0 12px rgba(0,208,148,0.2); }

.menu-toggle .bar {
    display: block;
    width: 1.125rem; height: 1.5px;
    background-color: var(--text-muted);
    border-radius: 9999px;
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.25s ease, background-color 0.25s ease;
    transform-origin: center;
}
.menu-toggle[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(6.5px) rotate(45deg); background-color: var(--accent); }
.menu-toggle[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; transform: scaleX(0.2); }
.menu-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); background-color: var(--accent); }
.menu-toggle[aria-expanded="true"] { border-color: var(--accent); box-shadow: 0 0 16px rgba(0,208,148,0.2); }

/* ============================================================
   MOBILE MENU
   ============================================================ */
#mobile-menu {
    position: fixed;
    inset: 0; z-index: 2000;
    visibility: hidden;
    pointer-events: none;
}
#mobile-menu.is-open {
    visibility: visible;
    pointer-events: auto;
}

/* Backdrop */
.mm-backdrop {
    position: absolute; inset: 0;
    background-color: rgba(0,0,0,0.5);
    opacity: 0;
    transition: opacity 0.35s ease;
}
html.light .mm-backdrop { background-color: rgba(0,0,0,0.25); }
#mobile-menu.is-open .mm-backdrop { opacity: 1; }

/* Slide Panel */
.mm-panel {
    position: absolute;
    top: 0; left: 0; right: 0;
    background-color: var(--bg-base);
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.3s ease;
    display: flex; flex-direction: column;
    min-height: 100svh;
}
#mobile-menu.is-open .mm-panel { transform: translateY(0); }

/* Teal glow at bottom of panel */
.mm-panel::after {
    content: '';
    position: absolute; bottom: 0; left: 15%; right: 15%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.4;
}

/* Close Button — standalone, absolute top-right of panel */
.mm-close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; color: var(--text-muted); font-size: 1rem;
    z-index: 10;
    transition: color 0.2s ease, border-color 0.2s ease, transform 0.25s ease, box-shadow 0.2s ease, background-color 0.3s ease;
}
.mm-close:hover {
    color: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 12px rgba(0,208,148,0.2);
    transform: rotate(90deg);
}

/* Nav Links */
.mm-nav {
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    flex: 1; padding: 2rem 1.5rem; gap: 0.1rem;
}

.mm-link {
    display: block;
    font-size: clamp(2rem, 8vw, 3.5rem);
    font-weight: 700; letter-spacing: -0.025em;
    color: var(--text-muted);
    text-decoration: none; padding: 0.3rem 1rem;
    line-height: 1.2;
    opacity: 0; transform: translateY(20px);
    transition: color 0.2s ease, opacity 0.35s ease, transform 0.35s ease;
    position: relative;
}
.mm-link::after {
    content: '';
    position: absolute; left: 1rem; bottom: 0;
    width: 0; height: 2px;
    background: var(--accent); border-radius: 9999px;
    transition: width 0.3s ease;
    box-shadow: 0 0 8px rgba(0,208,148,0.5);
}
.mm-link:hover { color: var(--text); }
.mm-link:hover::after { width: calc(100% - 2rem); }
.mm-link.active { color: var(--accent); }
.mm-link.active::after { width: 2rem; }

/* Stagger in */
#mobile-menu.is-open .mm-link { opacity: 1; transform: translateY(0); }
#mobile-menu.is-open .mm-link:nth-child(1) { transition-delay: 0.09s; }
#mobile-menu.is-open .mm-link:nth-child(2) { transition-delay: 0.14s; }
#mobile-menu.is-open .mm-link:nth-child(3) { transition-delay: 0.19s; }
#mobile-menu.is-open .mm-link:nth-child(4) { transition-delay: 0.24s; }
#mobile-menu.is-open .mm-link:nth-child(5) { transition-delay: 0.29s; }
#mobile-menu.is-open .mm-link:nth-child(6) { transition-delay: 0.34s; }

/* Footer Social */
.mm-footer {
    display: flex; justify-content: center; gap: 1rem;
    padding: 1.5rem; border-top: 1px solid var(--border);
    flex-shrink: 0;
    opacity: 0; transform: translateY(10px);
    transition: opacity 0.35s ease 0.4s, transform 0.35s ease 0.4s;
}
#mobile-menu.is-open .mm-footer { opacity: 1; transform: translateY(0); }
.mm-social {
    width: 2.5rem; height: 2.5rem; border-radius: 50%;
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-muted); font-size: 1.1rem; text-decoration: none;
    transition: color 0.2s ease, border-color 0.2s ease;
}
.mm-social:hover { color: var(--accent); border-color: var(--accent); }

/* ============================================================
   SCROLLBAR + SELECTION
   ============================================================ */
::-webkit-scrollbar              { width: 6px; }
::-webkit-scrollbar-track        { background: var(--bg-base); }
::-webkit-scrollbar-thumb        { background: var(--border-strong); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover  { background: var(--accent); }
::selection { background: rgba(0,208,148,0.25); color: var(--text); }

/* ============================================================
   CARDS / BORDERS TRANSITION
   ============================================================ */
.bg-\[\#16181D\] { transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease; }
html.light .bg-\[\#16181D\] { box-shadow: var(--shadow); }

/* ============================================================
   HERO MOCKUP ANIMATIONS
   ============================================================ */
.mockup-container {
    perspective: 1000px;
    position: relative;
}

.mockup-wrapper {
    position: relative;
    border-radius: 2.5rem;
    padding: 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5), 0 0 30px rgba(0,208,148,0.1);
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation: float 6s ease-in-out infinite;
}

html.light .mockup-wrapper {
    box-shadow: 0 20px 50px rgba(0,0,0,0.1), 0 0 20px rgba(0,208,148,0.05);
}

.mockup-image {
    width: 100%;
    height: auto;
    border-radius: 2rem;
    display: block;
}

.mockup-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(0,208,148,0.15) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotateX(2deg) rotateY(-2deg); }
    50% { transform: translateY(-20px) rotateX(0deg) rotateY(2deg); }
}