/* =========================================================
   ApexAI — Premium CSS
   Inspired by: Vercel · Stripe · Linear · Framer
   ========================================================= */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #fff;
    color: #0a0a0a;
    line-height: 1.5;
}

/* ── Design tokens ── */
:root {
    --black:   #0a0a0a;
    --white:   #ffffff;
    --green:   #16a34a;
    --green-h: #15803d;
    --green-l: #f0fdf4;
    --green-m: #dcfce7;
    --gray-1:  #f7f7f7;
    --gray-2:  #ebebeb;
    --gray-3:  #d4d4d4;
    --gray-4:  #a3a3a3;
    --gray-5:  #737373;
    --gray-6:  #525252;
    --gray-7:  #404040;
    --gray-8:  #262626;
    --gray-9:  #171717;
    --radius:  8px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.1);
    --shadow:    0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -1px rgba(0,0,0,.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -2px rgba(0,0,0,.04);
}

/* ── Selection ── */
::selection { background: #bbf7d0; }

/* ── Focus ── */
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }

/* ────────────────────────────────────────
   NAVBAR
──────────────────────────────────────── */
#site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.82);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--gray-2);
}

#site-header nav {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 9px;
    text-decoration: none;
    flex-shrink: 0;
}
.nav-logo span {
    font-size: 16px;
    font-weight: 700;
    color: var(--black);
    letter-spacing: -0.025em;
}

/* Center links */
.nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
}
.nav-links a {
    padding: 6px 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-6);
    text-decoration: none;
    border-radius: 6px;
    transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--black); background: var(--gray-1); }

.nav-link-ai {
    display: flex !important;
    align-items: center;
    gap: 6px;
}
.nav-ai-dot {
    width: 6px; height: 6px;
    background: var(--green);
    border-radius: 50%;
    display: inline-block;
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.75); }
}

/* Right side */
.nav-actions { display: flex; align-items: center; gap: 8px; }

.nav-credits {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-5);
    padding: 5px 10px;
    background: var(--gray-1);
    border-radius: 6px;
}

.nav-user-wrap { position: relative; }

.nav-user-btn {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 5px 12px 5px 6px;
    background: var(--white);
    border: 1px solid var(--gray-2);
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--black);
    font-family: inherit;
    transition: border-color .15s, box-shadow .15s;
}
.nav-user-btn:hover { border-color: var(--gray-3); box-shadow: var(--shadow-sm); }

.nav-avatar {
    width: 24px; height: 24px;
    background: var(--black);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    color: var(--white);
}

.nav-dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    width: 220px;
    background: var(--white);
    border: 1px solid var(--gray-2);
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,.12), 0 4px 8px rgba(0,0,0,.06);
    overflow: hidden;
    z-index: 200;
}
.nav-dropdown-header {
    padding: 12px 14px 10px;
    border-bottom: 1px solid var(--gray-1);
}
.nav-dropdown-label { font-size: 11px; font-weight: 600; color: var(--gray-4); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 2px; }
.nav-dropdown-email { font-size: 13px; font-weight: 600; color: var(--black); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-dropdown a {
    display: block;
    padding: 9px 14px;
    font-size: 14px;
    color: var(--gray-7);
    text-decoration: none;
    transition: background .1s;
}
.nav-dropdown a:hover { background: var(--gray-1); }
.nav-admin { color: var(--green) !important; font-weight: 600 !important; }
.nav-signout { color: var(--gray-4) !important; border-top: 1px solid var(--gray-1); }

.btn-ghost-nav {
    padding: 7px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-6);
    text-decoration: none;
    border-radius: 7px;
    transition: color .15s, background .15s;
}
.btn-ghost-nav:hover { color: var(--black); background: var(--gray-1); }

.btn-cta-nav {
    padding: 7px 16px;
    font-size: 14px;
    font-weight: 600;
    color: var(--white);
    background: var(--black);
    border-radius: 7px;
    text-decoration: none;
    transition: background .15s, transform .1s;
}
.btn-cta-nav:hover { background: var(--gray-9); transform: translateY(-1px); }

/* ────────────────────────────────────────
   MAIN
──────────────────────────────────────── */
#main-content { padding-top: 60px; }

/* ────────────────────────────────────────
   TYPOGRAPHY
──────────────────────────────────────── */
.t-hero {
    font-size: clamp(3rem, 7.5vw, 6.5rem);
    font-weight: 900;
    line-height: 1.02;
    letter-spacing: -0.04em;
    color: var(--black);
}
.t-h1 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.035em;
    color: var(--black);
}
.t-h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--black);
}
.t-h3 {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--black);
}
.t-body { font-size: 16px; line-height: 1.7; color: var(--gray-5); }
.t-body-sm { font-size: 14px; line-height: 1.65; color: var(--gray-5); }
.t-label { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--gray-4); }

/* ────────────────────────────────────────
   BUTTONS
──────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: 15px;
    line-height: 1;
    padding: 13px 24px;
    border-radius: var(--radius);
    text-decoration: none;
    cursor: pointer;
    border: 1.5px solid transparent;
    transition: all .15s;
    white-space: nowrap;
}
.btn-black { background: var(--black); color: var(--white); border-color: var(--black); }
.btn-black:hover { background: var(--gray-9); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,.2); }

.btn-green { background: var(--green); color: var(--white); border-color: var(--green); }
.btn-green:hover { background: var(--green-h); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(22,163,74,.3); }

.btn-outline { background: var(--white); color: var(--black); border-color: var(--gray-3); }
.btn-outline:hover { border-color: var(--gray-5); background: var(--gray-1); }

.btn-ghost { background: transparent; color: var(--gray-6); border-color: transparent; }
.btn-ghost:hover { background: var(--gray-1); color: var(--black); }

.btn-lg { padding: 15px 32px; font-size: 16px; border-radius: 10px; }
.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 6px; }

/* ────────────────────────────────────────
   LAYOUT
──────────────────────────────────────── */
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.wrap-sm { max-width: 680px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }

/* ────────────────────────────────────────
   CARDS
──────────────────────────────────────── */
.card {
    background: var(--white);
    border: 1px solid var(--gray-2);
    border-radius: var(--radius-lg);
    transition: box-shadow .2s, border-color .2s, transform .2s;
}
.card:hover {
    border-color: var(--gray-3);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}
.card-filled { background: var(--gray-1); border-color: transparent; }
.card-filled:hover { border-color: var(--gray-2); }

/* ────────────────────────────────────────
   BADGE
──────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 100px;
    border: 1px solid var(--gray-2);
    color: var(--gray-6);
    background: var(--white);
}
.badge-green { background: var(--green-l); color: var(--green); border-color: #bbf7d0; }

/* ────────────────────────────────────────
   INPUTS
──────────────────────────────────────── */
input, textarea, select {
    font-family: inherit;
    font-size: 15px;
    color: var(--black);
    background: var(--white);
    border: 1.5px solid var(--gray-3);
    border-radius: var(--radius);
    padding: 11px 14px;
    width: 100%;
    transition: border-color .15s, box-shadow .15s;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--black);
    box-shadow: 0 0 0 3px rgba(0,0,0,0.08);
}
input::placeholder, textarea::placeholder { color: var(--gray-3); }
label { font-size: 13px; font-weight: 600; color: var(--gray-7); display: block; margin-bottom: 6px; }

/* ────────────────────────────────────────
   FOOTER
──────────────────────────────────────── */
#site-footer {
    background: var(--black);
    color: var(--white);
    padding: 64px 0 32px;
    margin-top: 64px;
}
.footer-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    margin-bottom: 14px;
}
.footer-logo span { font-size: 16px; font-weight: 700; color: var(--white); letter-spacing: -0.02em; }
.footer-brand p { font-size: 14px; color: var(--gray-4); line-height: 1.65; max-width: 240px; }

.footer-col h5 { font-size: 12px; font-weight: 700; color: var(--gray-5); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 16px; }
.footer-col a, .footer-col span { display: block; font-size: 14px; color: var(--gray-4); text-decoration: none; margin-bottom: 10px; transition: color .15s; }
.footer-col a:hover { color: var(--white); }

.footer-bottom {
    max-width: 1120px;
    margin: 0 auto;
    padding: 24px 24px 0;
    border-top: 1px solid var(--gray-8);
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--gray-5);
}

/* ────────────────────────────────────────
   UTILITIES
──────────────────────────────────────── */
.text-green { color: var(--green); }
.text-muted { color: var(--gray-4); }
.divide-y > * + * { border-top: 1px solid var(--gray-2); }
.font-mono { font-family: 'JetBrains Mono', 'Fira Code', monospace; }

/* ────────────────────────────────────────
   CHECK LIST
──────────────────────────────────────── */
.checklist { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.checklist li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--gray-6);
    line-height: 1.5;
}
.check-icon {
    width: 18px; height: 18px;
    background: var(--green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

/* ────────────────────────────────────────
   FORMS / ALERTS
──────────────────────────────────────── */
.alert { padding: 12px 16px; border-radius: var(--radius); font-size: 14px; display: flex; align-items: center; gap: 10px; }
.alert-error { background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; }
.alert-success { background: var(--green-l); border: 1px solid #bbf7d0; color: var(--green-h); }

/* ────────────────────────────────────────
   TOAST
──────────────────────────────────────── */
.toast {
    position: fixed;
    bottom: 24px; right: 24px;
    background: var(--black);
    color: var(--white);
    border-radius: 10px;
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 500;
    z-index: 9999;
    box-shadow: 0 8px 32px rgba(0,0,0,.25);
    animation: toast-up .2s ease;
}
@keyframes toast-up { from { opacity:0; transform: translateY(8px); } to { opacity:1; transform: translateY(0); } }

/* ────────────────────────────────────────
   SPINNER
──────────────────────────────────────── */
.spinner {
    width: 16px; height: 16px;
    border: 2px solid rgba(0,0,0,.1);
    border-top-color: var(--black);
    border-radius: 50%;
    animation: spin .65s linear infinite;
    display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ────────────────────────────────────────
   DASHBOARD SIDEBAR
──────────────────────────────────────── */
.sidebar-link {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 8px 10px;
    border-radius: 7px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-5);
    text-decoration: none;
    transition: all .14s;
}
.sidebar-link:hover { color: var(--black); background: var(--gray-1); }
.sidebar-link.active { color: var(--black); background: var(--gray-1); font-weight: 600; }
.sidebar-link.active .sidebar-icon { color: var(--green); }

/* ────────────────────────────────────────
   PROGRESS
──────────────────────────────────────── */
.progress-bar { height: 4px; background: var(--gray-2); border-radius: 99px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--green); border-radius: 99px; transition: width .5s ease; }

/* ────────────────────────────────────────
   RESPONSIVE
──────────────────────────────────────── */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    #main-content { padding-top: 60px; }
}
@media (max-width: 480px) {
    .footer-inner { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 8px; }
}