@import url('variables.css');

/* ==========================================================================
   Base Reset & Typography
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family-body);
    color: var(--color-muted);
    background-color: var(--color-surface-alt);
    line-height: 1.7;
    letter-spacing: 0.01em;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    color: var(--color-ink);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

h1 { font-size: clamp(2.25rem, 3vw, var(--font-size-h1)); }
h2 { font-size: clamp(1.85rem, 2.4vw, var(--font-size-h2)); }
h3 { font-size: clamp(1.35rem, 2vw, var(--font-size-h3)); }
h4 { font-size: clamp(1.1rem, 1.6vw, var(--font-size-h4)); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-muted);
    font-size: 1.02rem;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-primary-strong);
}

img {
    max-width: 100%;
    display: block;
    border-radius: var(--border-radius-md);
}

ul {
    list-style: none;
    padding-left: 0;
}

strong {
    color: var(--color-ink);
}

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.content-width {
    max-width: var(--content-width);
    margin: 0 auto;
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    margin-bottom: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.section-header.center {
    text-align: center;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2xs);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary-strong);
    background: var(--color-highlight);
    padding: var(--spacing-2xs) var(--spacing-sm);
    border-radius: 999px;
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2xs);
    padding: var(--spacing-2xs) var(--spacing-sm);
    border-radius: 999px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-subtle);
    font-weight: var(--font-weight-medium);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-2xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    background: var(--color-eco-soft);
    color: var(--color-eco);
    font-weight: var(--font-weight-semibold);
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.stack {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    border: 1px solid transparent;
    font-weight: var(--font-weight-semibold);
    text-transform: none;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background-color: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-strong);
    border-color: var(--color-primary-strong);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    color: var(--color-primary-strong);
    border-color: var(--color-primary-strong);
    box-shadow: var(--shadow-sm);
}

.btn-ghost {
    background: transparent;
    color: var(--color-ink);
    border: none;
}

.btn-text {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 900;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    gap: var(--spacing-lg);
}

.brand {
    font-weight: var(--font-weight-bold);
    font-size: 1.3rem;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2xs);
    padding: var(--spacing-sm) var(--spacing-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-ink);
}

.nav-link:hover { color: var(--color-primary); }

.dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    background: #fff;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-md);
    min-width: 240px;
    padding: var(--spacing-sm);
    z-index: 20;
}

.nav-item:hover > .dropdown,
.nav-item:focus-within > .dropdown {
    display: grid;
    gap: var(--spacing-xs);
}

.dropdown a {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    color: var(--color-muted);
}

.dropdown a:hover {
    background: var(--color-highlight);
    color: var(--color-primary-strong);
}

.dropdown.open {
    display: grid;
    gap: var(--spacing-xs);
}

.menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--color-border);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 1.2rem;
    cursor: pointer;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Mobile navigation */
@media (max-width: 1023px) {
    .menu-toggle { display: inline-flex; }
    .nav-links {
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border);
        display: none;
    }
    .nav-links.open { display: flex; }
    .dropdown {
        position: relative;
        top: 0;
        left: 0;
        width: 100%;
        box-shadow: none;
        border: 1px solid var(--color-border);
    }
}

main {
    padding-top: var(--spacing-md);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
    position: relative;
    overflow: hidden;
    color: #fff;
    background-size: cover;
    background-position: center;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(15, 23, 42, 0.7) 0%, rgba(29, 78, 216, 0.55) 50%, rgba(12, 74, 110, 0.35) 100%);
}

.hero-inner {
    position: relative;
    z-index: 1;
    padding: var(--spacing-3xl) 0;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-copy h1 {
    color: #fff;
    margin-bottom: var(--spacing-md);
}

.hero-copy p {
    color: rgba(255,255,255,0.92);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.hero-visual {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
}

.stat-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.stat {
    padding: var(--spacing-sm);
    background: rgba(255,255,255,0.08);
    border-radius: var(--border-radius-md);
    text-align: center;
}

.stat strong {
    display: block;
    font-size: 1.35rem;
    color: #fff;
}

/* ==========================================================================
   Cards & Components
   ========================================================================== */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    height: 100%;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-border-strong);
}

.icon-circle {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--color-highlight);
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.list-check {
    display: grid;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.list-check li {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xs);
    align-items: start;
    color: var(--color-muted);
}

.list-check li::before {
    content: '•';
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

.highlight {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
}

.image-card {
    position: relative;
    overflow: hidden;
}

.image-card img {
    width: 100%;
    display: block;
    border-radius: var(--border-radius-lg);
}

.image-card .label {
    position: absolute;
    bottom: var(--spacing-sm);
    left: var(--spacing-sm);
    background: rgba(15,23,42,0.75);
    color: #fff;
    padding: var(--spacing-2xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
}

/* Process Flow */
.process-flow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    position: relative;
}

.process-step {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    position: relative;
    cursor: pointer;
    transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.process-step::after {
    content: attr(data-step);
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    background: var(--color-highlight);
    padding: var(--spacing-2xs) var(--spacing-sm);
    border-radius: 999px;
}

.process-step.active {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.process-meta {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}

.process-meta .pill {
    background: var(--color-surface-alt);
}

/* Applications */
.application-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    display: grid;
    grid-template-rows: 160px 1fr;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.application-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.application-media { position: relative; }
.application-media img { border-radius: 0; height: 100%; object-fit: cover; }
.application-body { padding: var(--spacing-lg); }
.application-body h4 { margin-bottom: var(--spacing-xs); }
.application-body p { margin-bottom: var(--spacing-sm); }
.tag-row { display: flex; flex-wrap: wrap; gap: var(--spacing-2xs); margin-bottom: var(--spacing-sm); }
.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2xs);
    padding: var(--spacing-2xs) var(--spacing-sm);
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: 0.9rem;
}

/* Sustainability Dashboard */
.sustainability-dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
}

.metric-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.meter {
    width: 100%;
    height: 12px;
    background: var(--color-border);
    border-radius: 999px;
    overflow: hidden;
    margin: var(--spacing-xs) 0 var(--spacing-sm);
}

.meter-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--color-eco), var(--color-primary));
    border-radius: 999px;
    transition: width 1s ease-out;
}

.metric-value {
    font-size: 1.4rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-ink);
}

.metric-note {
    color: var(--color-subtle);
    font-size: 0.95rem;
}

/* CTA / Panels */
.cta-panel {
    background: linear-gradient(135deg, rgba(29,78,216,0.9), rgba(8,145,178,0.9));
    color: #fff;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    box-shadow: var(--shadow-md);
}

.cta-panel h3, .cta-panel p { color: #fff; }
.cta-panel .btn-secondary { color: #fff; border-color: rgba(255,255,255,0.6); }
.cta-panel .btn-secondary:hover { border-color: #fff; background: rgba(255,255,255,0.1); }

/* Timeline */
.timeline {
    border-left: 2px solid var(--color-border-strong);
    padding-left: var(--spacing-lg);
    display: grid;
    gap: var(--spacing-md);
}

.timeline-item {
    position: relative;
    padding-left: var(--spacing-md);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -var(--spacing-lg);
    top: var(--spacing-xs);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--color-primary);
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-md);
    background: var(--color-surface);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.data-table th, .data-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    color: var(--color-muted);
}

.data-table th {
    background: var(--color-surface-alt);
    color: var(--color-ink);
    font-weight: var(--font-weight-semibold);
}

.data-table tr:last-child td { border-bottom: none; }

/* Cards with image banner */
.feature-banner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.feature-banner img { border-radius: var(--border-radius-lg); }

.stat-blocks {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.stat-block {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    text-align: center;
}

.stat-block strong {
    display: block;
    font-size: 1.5rem;
    color: var(--color-primary);
}

/* Footer */
.footer {
    background: var(--color-primary-strong);
    color: rgba(255,255,255,0.9);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-3xl);
}

.footer a { color: rgba(255,255,255,0.9); }
.footer a:hover { color: #fff; }

.footer h4 {
    color: #fff;
    margin-bottom: var(--spacing-sm);
}

.footer-links li { margin-bottom: var(--spacing-2xs); }

.footer-bottom {
    margin-top: var(--spacing-xl);
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.15);
    padding-top: var(--spacing-md);
    font-size: 0.95rem;
}

/* Helpers */
.muted { color: var(--color-subtle); }
.surface { background: var(--color-surface); border-radius: var(--border-radius-lg); }
.divider { height: 1px; background: var(--color-border); margin: var(--spacing-lg) 0; }
.shadowed { box-shadow: var(--shadow-sm); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1023px) {
    .hero-grid { grid-template-columns: 1fr; }
    .cta-panel { grid-template-columns: 1fr; }
    .feature-banner { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
    .section { padding: var(--spacing-2xl) 0; }
    .card, .metric-card, .process-step { padding: var(--spacing-md); }
    .hero-inner { padding: var(--spacing-2xl) 0; }
    .hero-visual { padding: var(--spacing-md); }
}