/* portal.css — DevOps Learning Portal landing page */

:root {
    --bg-base: #0a0e1a;
    --bg-surface: #121a2b;
    --bg-surface-elevated: #1a2438;
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f5f6fb;
    --text-secondary: #a3acc2;
    --text-muted: #6b7693;
    --color-primary: #7c5cff;
    --color-primary-glow: rgba(124, 92, 255, 0.30);
    --color-secondary: #22d3ee;
    --color-success: #22c55e;
    --color-warning: #fbbf24;
    --gradient-brand: linear-gradient(120deg, #7c5cff 0%, #b06bff 45%, #22d3ee 100%);
    --gradient-accent: linear-gradient(135deg, #7c5cff 0%, #22d3ee 100%);
    --font-sans: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius-lg: 18px;
    --radius-md: 12px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body.light-theme {
    --bg-base: #eef1f8;
    --bg-surface: #ffffff;
    --bg-surface-elevated: #f6f8fc;
    --border-color: rgba(17, 24, 39, 0.09);
    --text-primary: #141b2d;
    --text-secondary: #4b5571;
    --text-muted: #8a93ab;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    background-image:
        radial-gradient(circle at 15% 10%, rgba(124, 92, 255, 0.14), transparent 42%),
        radial-gradient(circle at 85% 0%, rgba(34, 211, 238, 0.10), transparent 38%);
    background-attachment: fixed;
}

.portal-wrapper {
    max-width: 1180px;
    margin: 0 auto;
    padding: 32px 24px 80px;
}

/* Top bar */
.portal-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 48px;
}

.portal-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.portal-brand i {
    font-size: 1.8rem;
    color: var(--color-primary);
    filter: drop-shadow(0 0 8px var(--color-primary-glow));
}

.theme-toggle-btn {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

.theme-toggle-btn:hover {
    color: var(--text-primary);
    border-color: var(--color-primary);
}

/* Hero */
.portal-hero {
    text-align: center;
    margin-bottom: 56px;
}

.portal-hero h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.portal-hero p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 620px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Phase section */
.phase-block { margin-bottom: 44px; }

.phase-heading {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.phase-heading .phase-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--gradient-accent);
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    flex-shrink: 0;
    box-shadow: 0 4px 14px -4px var(--color-primary-glow);
}

.phase-heading h2 {
    font-size: 1.25rem;
    font-weight: 700;
}

.phase-heading span.phase-sub {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Tool grid */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 18px;
}

.tool-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 22px;
    border-radius: var(--radius-lg);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    overflow: hidden;
}

.tool-card.available {
    cursor: pointer;
}

.tool-card.available:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: 0 18px 40px -16px var(--color-primary-glow), 0 12px 32px rgba(0, 0, 0, 0.35);
}

.tool-card.available::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-brand);
    opacity: 0;
    transition: var(--transition);
}

.tool-card.available:hover::before {
    opacity: 1;
}

.tool-card.locked {
    opacity: 0.62;
    cursor: not-allowed;
}

.tool-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    border-radius: var(--radius-md);
    font-size: 1.6rem;
    background-color: var(--bg-surface-elevated);
}

.tool-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
}

.tool-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    flex-grow: 1;
}

.tool-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 4px;
}

.tool-badge {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 4px 10px;
    border-radius: 999px;
}

.badge-available {
    color: var(--color-success);
    background-color: rgba(16, 185, 129, 0.12);
}

.badge-soon {
    color: var(--color-warning);
    background-color: rgba(245, 158, 11, 0.12);
}

.tool-cta {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.tool-card.available:hover .tool-cta i {
    transform: translateX(4px);
}

.tool-cta i { transition: var(--transition); }

/* Footer */
.portal-footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    line-height: 1.8;
}

.portal-footer a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
}

.portal-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 560px) {
    .portal-topbar { margin-bottom: 32px; }
    .tool-grid { grid-template-columns: 1fr; }
}