/* ============================================================
   TechStackIPO — 2026 Design System
   Shared across all pages. Never import Tailwind alongside this.
   ============================================================ */

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

/* ===== TOKENS ===== */
:root {
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-800: #1e40af;
    --purple-50: #faf5ff;
    --purple-100: #ede9fe;
    --purple-500: #8b5cf6;
    --purple-600: #7c3aed;
    --green-400: #4ade80;
    --green-500: #22c55e;
    --amber-400: #fbbf24;
    --amber-500: #f59e0b;
    --red-400: #f87171;
    --navy: #0a0a1a;
    --navy-light: #111827;

    /* Stage colors */
    --stage-seed: #10b981;
    --stage-a: #06b6d4;
    --stage-b: #3b82f6;
    --stage-c: #8b5cf6;
    --stage-d: #a855f7;
    --stage-preipo: #f59e0b;
    --stage-ipo: #ef4444;
    --stage-public: #22c55e;
}

/* ===== BASE ===== */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--white);
    color: var(--gray-900);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ===== NAV — standard (inner pages, always white) ===== */
.ds-nav {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
}
.ds-nav .nav-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 16px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.ds-nav .logo {
    font-weight: 800;
    font-size: 20px;
    letter-spacing: -0.5px;
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: 0;
}
.ds-nav .nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}
.ds-nav .nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-500);
    transition: color 0.2s;
}
.ds-nav .nav-links a:hover { color: var(--gray-900); }
.ds-nav .nav-links a.active { color: var(--gray-900); font-weight: 600; }
.ds-nav .nav-links a.ai-link { color: var(--purple-600); font-weight: 600; }
.ds-nav .nav-links a.premium-link { color: var(--blue-600); font-weight: 600; }
.ds-nav .nav-cta {
    font-size: 13px !important;
    font-weight: 600 !important;
    padding: 8px 20px;
    border-radius: 6px;
    background: var(--gray-900);
    color: var(--white) !important;
    transition: all 0.2s;
}
.ds-nav .nav-cta:hover { opacity: 0.85; }

/* ===== FOOTER ===== */
.ds-footer {
    background: var(--navy-light);
    padding: 48px 40px;
    margin-top: 80px;
}
.ds-footer .footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.ds-footer .footer-logo {
    font-size: 16px;
    font-weight: 700;
    color: rgba(255,255,255,0.6);
}
.ds-footer .footer-links {
    display: flex;
    gap: 32px;
}
.ds-footer .footer-links a {
    font-size: 13px;
    color: rgba(255,255,255,0.3);
    transition: color 0.2s;
}
.ds-footer .footer-links a:hover { color: rgba(255,255,255,0.7); }
.ds-footer .footer-copy {
    font-size: 13px;
    color: rgba(255,255,255,0.2);
}
.ds-footer .footer-bottom {
    max-width: 1280px;
    margin: 16px auto 0;
    padding: 16px 0 0;
    border-top: 1px solid rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
.ds-footer .footer-legal {
    font-size: 12px;
    color: rgba(255,255,255,0.2);
}
.ds-footer .footer-legal-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
.ds-footer .footer-legal-links a {
    font-size: 12px;
    color: rgba(255,255,255,0.25);
    transition: color 0.2s;
}
.ds-footer .footer-legal-links a:hover { color: rgba(255,255,255,0.5); }

/* ===== PAGE HEADER ===== */
.ds-page-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 48px 0 40px;
    margin-top: 0;
}
.ds-page-header .page-header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}
.ds-page-header .page-eyebrow {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--gray-400);
    margin-bottom: 12px;
}
.ds-page-header h1 {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -1.5px;
    color: var(--gray-900);
    line-height: 1.1;
    margin-bottom: 8px;
}
.ds-page-header .page-desc {
    font-size: 16px;
    color: var(--gray-500);
    max-width: 560px;
    line-height: 1.7;
}

/* ===== SECTION ===== */
.ds-section {
    max-width: 1280px;
    margin: 0 auto;
    padding: 64px 40px;
}
.section-eyebrow {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--gray-400);
    margin-bottom: 16px;
}
.section-title {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.1;
    color: var(--gray-900);
    margin-bottom: 12px;
}
.section-subtitle {
    font-size: 16px;
    color: var(--gray-500);
    max-width: 560px;
    line-height: 1.7;
}

/* ===== CARD ===== */
.ds-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: 28px;
    transition: all 0.25s ease;
}
.ds-card:hover {
    border-color: var(--gray-300);
    box-shadow: 0 8px 30px rgba(0,0,0,0.06);
    transform: translateY(-2px);
}

/* ===== BADGE ===== */
.ds-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
}
.ds-badge-blue { background: var(--blue-50); color: var(--blue-700); }
.ds-badge-green { background: #dcfce7; color: #15803d; }
.ds-badge-amber { background: #fef3c7; color: #b45309; }
.ds-badge-gray { background: var(--gray-100); color: var(--gray-600); }
.ds-badge-purple { background: var(--purple-100); color: var(--purple-600); }

/* ===== BUTTONS ===== */
.ds-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    text-decoration: none;
}
.ds-btn-primary {
    background: var(--gray-900);
    color: var(--white);
}
.ds-btn-primary:hover { background: var(--gray-700); transform: translateY(-1px); }
.ds-btn-secondary {
    background: var(--white);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}
.ds-btn-secondary:hover { background: var(--gray-50); border-color: var(--gray-300); }
.ds-btn-outline {
    background: transparent;
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}
.ds-btn-outline:hover { background: var(--gray-50); border-color: var(--gray-300); }
.ds-btn-blue {
    background: var(--blue-600);
    color: var(--white);
}
.ds-btn-blue:hover { background: var(--blue-700); transform: translateY(-1px); }

/* ===== FORM INPUTS ===== */
.ds-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    color: var(--gray-900);
    background: var(--white);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}
.ds-input:focus {
    border-color: var(--blue-500);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.ds-input::placeholder { color: var(--gray-400); }
.ds-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
    cursor: pointer;
}

/* ===== TABLE ===== */
.ds-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.ds-table th {
    text-align: left;
    padding: 12px 16px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--gray-400);
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}
.ds-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    vertical-align: middle;
}
.ds-table tr:last-child td { border-bottom: none; }
.ds-table tr:hover td { background: var(--gray-50); }

/* ===== LOADING SHIMMER ===== */
.ds-skeleton {
    background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
    background-size: 200% 100%;
    animation: ds-shimmer 1.5s infinite;
    border-radius: 8px;
}
@keyframes ds-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ===== EMPTY STATE ===== */
.ds-empty {
    text-align: center;
    padding: 80px 40px;
    color: var(--gray-400);
}
.ds-empty-icon { font-size: 40px; margin-bottom: 16px; opacity: 0.5; }
.ds-empty h3 { font-size: 18px; font-weight: 700; color: var(--gray-600); margin-bottom: 8px; }
.ds-empty p { font-size: 14px; max-width: 320px; margin: 0 auto; }

/* ===== IPO SCORE BADGE ===== */
.ipo-score {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
}
.ipo-score-high { background: var(--blue-50); color: var(--blue-700); }
.ipo-score-good { background: #dcfce7; color: #15803d; }
.ipo-score-mid { background: #fef3c7; color: #b45309; }
.ipo-score-low { background: #fee2e2; color: #b91c1c; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .ds-nav .nav-inner { padding: 16px 24px; }
    .ds-section { padding: 48px 24px; }
    .ds-page-header .page-header-inner { padding: 0 24px; }
    .ds-footer { padding: 40px 24px; }
}
@media (max-width: 768px) {
    .ds-nav .nav-links { gap: 16px; }
    .ds-nav .hide-mobile { display: none; }
    .ds-footer .footer-inner { flex-direction: column; gap: 24px; text-align: center; }
    .ds-footer .footer-links { gap: 20px; justify-content: center; }
    .ds-footer .footer-bottom { flex-direction: column; text-align: center; }
    .ds-footer .footer-legal-links { justify-content: center; }
    .section-title { font-size: 28px; }
    .ds-page-header h1 { font-size: 28px; }
}
@media (max-width: 480px) {
    .ds-nav .nav-links { display: none; }
}