/* ═══════════════════════════════════════════════════════════════
   InterestCalc Pro – Landing Page Stylesheet
   ═══════════════════════════════════════════════════════════════ */

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

:root {
    --navy:     #1e3a5f;
    --navy-dk:  #152d4a;
    --blue:     #2980b9;
    --teal:     #1abc9c;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-500: #64748b;
    --gray-700: #334155;
    --gray-900: #0f172a;
    --white:    #ffffff;
    --shadow:   0 4px 12px rgba(0,0,0,.1);
    --radius:   10px;
    --radius-sm: 6px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--gray-900);
    line-height: 1.6;
}

a { color: var(--blue); text-decoration: none; }

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
    display: flex;
    align-items: center;
    gap: .4rem;
}
.logo-icon { font-size: 1.6rem; color: var(--teal); }

/* ── Buttons ──────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    padding: .55rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: .875rem;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all .15s;
    text-decoration: none !important;
    white-space: nowrap;
}
.btn--primary  { background: var(--blue); color: var(--white); border-color: var(--blue); }
.btn--primary:hover  { background: var(--navy); border-color: var(--navy); }
.btn--outline  { background: transparent; color: var(--white); border-color: rgba(255,255,255,.6); }
.btn--outline:hover  { background: rgba(255,255,255,.1); }
.btn--ghost    { background: transparent; color: var(--white); border-color: rgba(255,255,255,.4); }
.btn--ghost:hover    { background: rgba(255,255,255,.1); }
.btn--full     { width: 100%; }
.btn--lg       { padding: .7rem 2rem; font-size: 1rem; }

/* Outline inside white sections */
section .btn--outline {
    color: var(--blue);
    border-color: var(--blue);
}
section .btn--outline:hover { background: var(--blue); color: var(--white); }

/* ── Header ───────────────────────────────────────────────────── */
.landing-header { background: var(--navy); padding: 1rem 1.5rem; }
.landing-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.landing-header nav { display: flex; gap: .75rem; align-items: center; }

/* ── Hero ─────────────────────────────────────────────────────── */
.hero {
    background: linear-gradient(135deg, var(--navy-dk) 0%, var(--navy) 50%, #1a5276 100%);
    padding: 5rem 1.5rem;
    text-align: center;
}
.hero-inner { max-width: 720px; margin: 0 auto; }
.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 1.25rem;
}
.hero h1 span { color: var(--teal); }
.hero p { font-size: 1.125rem; color: rgba(255,255,255,.8); margin-bottom: 2rem; }
.hero .btn { margin: .25rem .4rem; }

/* ── Features ─────────────────────────────────────────────────── */
.features { padding: 4rem 1.5rem; background: var(--gray-100); }
.features-inner { max-width: 1100px; margin: 0 auto; }
.features h2 {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 2.5rem;
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.25rem;
}
.feature-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1.5rem 1.25rem;
    text-align: center;
    transition: box-shadow .15s;
}
.feature-card:hover { box-shadow: var(--shadow); }
.feature-icon  { font-size: 2rem; margin-bottom: .75rem; }
.feature-card h3 { font-size: .95rem; font-weight: 700; color: var(--navy); margin-bottom: .5rem; }
.feature-card p  { font-size: .825rem; color: var(--gray-500); }

/* ── Pricing ──────────────────────────────────────────────────── */
.pricing { padding: 4rem 1.5rem; background: var(--white); }
.pricing-inner { max-width: 900px; margin: 0 auto; }
.pricing h2 {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 2.5rem;
}
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.5rem;
    align-items: start;
}
.pricing-card {
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 2rem 1.5rem;
    background: var(--white);
    position: relative;
}
.pricing-card--featured {
    border-color: var(--blue);
    box-shadow: 0 0 0 4px rgba(41,128,185,.12);
}
.plan-badge {
    position: absolute;
    top: -13px; left: 50%;
    transform: translateX(-50%);
    background: var(--blue);
    color: var(--white);
    font-size: .7rem;
    font-weight: 700;
    padding: .2rem .9rem;
    border-radius: 99px;
    text-transform: uppercase;
    letter-spacing: .05em;
    white-space: nowrap;
}
.plan-name  { font-size: 1rem; font-weight: 700; color: var(--navy); margin-bottom: .4rem; }
.plan-price { font-size: 2.5rem; font-weight: 800; color: var(--navy); margin-bottom: 1.25rem; line-height: 1.1; }
.plan-price span { font-size: 1rem; font-weight: 400; color: var(--gray-500); }
.pricing-card ul { list-style: none; margin-bottom: 1.5rem; }
.pricing-card ul li {
    font-size: .875rem;
    color: var(--gray-700);
    padding: .3rem 0 .3rem 1.2rem;
    border-bottom: 1px solid var(--gray-100);
    position: relative;
}
.pricing-card ul li::before { content: '✓'; position: absolute; left: 0; color: var(--teal); font-weight: 700; }

/* ── Footer ───────────────────────────────────────────────────── */
.landing-footer {
    background: var(--navy);
    color: rgba(255,255,255,.5);
    text-align: center;
    padding: 1.25rem;
    font-size: .825rem;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 600px) {
    .landing-header nav .btn--outline { display: none; }
    .pricing-grid { grid-template-columns: 1fr; }
    .hero .btn--ghost { display: none; }
}