/* Shared design system for MaturityAssess, reused across every page. */

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

:root {
    --primary: #0f3a7d;
    --secondary: #1e5a96;
    --accent: #00a8e8;
    --light-accent: #e0f4ff;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #1f2937;
    --light: #f9fafb;
    --border: #e5e7eb;
    --muted: #6b7280;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--dark);
    background: linear-gradient(135deg, #f8fafc 0%, #f0f4f8 100%);
    line-height: 1.6;
}

a { color: inherit; }

/* ---------------- Navigation ---------------- */
nav {
    background: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow 0.3s ease;
}
nav.scrolled { box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12); }

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    white-space: nowrap;
}

.nav-group { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }

.nav-dropdown { position: relative; }

.nav-dropdown-btn {
    background: none;
    border: none;
    font: inherit;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0;
}
.nav-dropdown-btn:hover { color: var(--accent); }
.nav-dropdown-btn .caret { font-size: 0.7rem; transition: transform 0.2s ease; }
.nav-dropdown.open .caret { transform: rotate(180deg); }

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    background: white;
    border-radius: 10px;
    box-shadow: 0 12px 30px rgba(0,0,0,0.15);
    border: 1px solid var(--border);
    min-width: 240px;
    padding: 0.5rem;
    display: none;
    z-index: 200;
    max-height: 70vh;
    overflow-y: auto;
}
.nav-dropdown.open .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a, .nav-dropdown-menu button {
    display: block;
    width: 100%;
    text-align: left;
    padding: 0.6rem 0.75rem;
    border-radius: 6px;
    text-decoration: none;
    color: var(--dark);
    font-size: 0.92rem;
    background: none;
    border: none;
    font-family: inherit;
    cursor: pointer;
}
.nav-dropdown-menu a:hover, .nav-dropdown-menu button:hover { background: var(--light-accent); color: var(--primary); }
.nav-dropdown-menu .menu-group-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
    padding: 0.6rem 0.75rem 0.2rem;
}

/* ---------------- Buttons ---------------- */
button, .btn {
    position: relative;
    overflow: hidden;
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease, background 0.3s ease, border-color 0.3s ease;
    text-decoration: none;
    display: inline-block;
    font-family: inherit;
    -webkit-tap-highlight-color: transparent;
}
button:active, .btn:active { transform: scale(0.96); }
button:focus-visible, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-sm { padding: 0.6rem 1.1rem; font-size: 0.9rem; }

.ripple { position: absolute; border-radius: 50%; transform: scale(0); animation: rippleAnim 0.6s ease-out; pointer-events: none; }
@keyframes rippleAnim { to { transform: scale(3.2); opacity: 0; } }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 15px rgba(15, 58, 125, 0.3);
}
.btn-primary::before {
    content: ''; position: absolute; top: 0; left: -75%; width: 45%; height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255,255,255,0.35), transparent);
    transform: skewX(-20deg); transition: left 0.6s ease; pointer-events: none;
}
.btn-primary:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 8px 24px rgba(15, 58, 125, 0.45); }
.btn-primary:hover::before { left: 125%; }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-secondary { background: white; color: var(--primary); border: 2px solid var(--primary); }
.btn-secondary:hover { background: var(--light-accent); transform: translateY(-2px) scale(1.02); box-shadow: 0 6px 18px rgba(15, 58, 125, 0.15); }

.btn-light { background: white; color: var(--primary); font-weight: 600; }
.btn-light:hover { background: var(--light); transform: translateY(-2px) scale(1.03); box-shadow: 0 8px 22px rgba(0,0,0,0.18); }

.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* ---------------- Layout helpers ---------------- */
section { max-width: 1400px; margin: 0 auto; padding: 4rem 2rem; }
.section-narrow { max-width: 900px; }
section h2 { font-size: 2.3rem; font-weight: 800; margin-bottom: 1rem; color: var(--primary); text-align: center; }
.section-subtitle { text-align: center; color: var(--muted); font-size: 1.05rem; max-width: 640px; margin: 0 auto 2.5rem; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }

.card {
    background: white; border-radius: 12px; padding: 2rem;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    transition: transform 0.15s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    border: 1px solid var(--border);
}
.card:hover { box-shadow: 0 16px 36px rgba(0,0,0,0.14); border-color: var(--accent); }

/* ---------------- Reveal-on-scroll ---------------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s cubic-bezier(0.22,1,0.36,1), transform 0.6s cubic-bezier(0.22,1,0.36,1); }
.reveal.in-view { opacity: 1; transform: translateY(0); }

.scroll-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0%; background: linear-gradient(90deg, var(--accent), var(--primary)); z-index: 1200; transition: width 0.1s ease-out; }

.back-to-top {
    position: fixed; bottom: 28px; right: 28px; width: 46px; height: 46px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent)); color: white; border: none;
    font-size: 1.2rem; cursor: pointer; box-shadow: 0 6px 20px rgba(15,58,125,0.35);
    opacity: 0; transform: translateY(20px) scale(0.8); pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease; z-index: 999;
}
.back-to-top.visible { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.back-to-top:hover { transform: translateY(-4px) scale(1.08); }

/* ---------------- Forms ---------------- */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.4rem; font-size: 0.95rem; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--border); border-radius: 8px;
    font-size: 0.95rem; font-family: inherit; background: white;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--accent); }
.form-error { color: var(--danger); font-size: 0.85rem; margin-top: 0.4rem; display: none; }
.form-error.visible { display: block; }
.form-status { margin-top: 1rem; padding: 0.9rem 1rem; border-radius: 8px; font-size: 0.9rem; display: none; }
.form-status.success { display: block; background: rgba(16,185,129,0.1); color: #047857; }
.form-status.error { display: block; background: rgba(239,68,68,0.1); color: #b91c1c; }

.spinner { display: inline-block; width: 18px; height: 18px; border: 2px solid rgba(255,255,255,0.4); border-top-color: white; border-radius: 50%; animation: spin 0.7s linear infinite; vertical-align: middle; margin-right: 0.5rem; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------- Footer ---------------- */
footer { background: var(--dark); color: white; padding: 2.5rem 2rem; text-align: center; margin-top: 4rem; }
footer a { color: var(--accent); text-decoration: none; }

@media (max-width: 768px) {
    section { padding: 3rem 1.5rem; }
    .nav-container { padding: 1rem; }
}