/* tanso.in — Mid-Century Modern Carbon Tracker */

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

:root {
    --navy: #2C3E50;
    --warm-white: #FEFCF8;
    --slate: #4A5568;
    --white: #FFFFFF;
    --cloud: #E2E8F0;
    --teal: #38B2AC;
    --amber: #E8A838;
    --coral: #E76F51;
    --green: #48BB78;
    --light-slate: #718096;
}

body {
    background: var(--warm-white);
    color: var(--navy);
    font-family: 'Mulish', sans-serif;
    overflow-x: hidden;
}

/* Hero */
.hero {
    height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 40px 24px;
}

.donut-chart {
    position: relative;
    width: 280px;
    height: 280px;
    margin-bottom: 32px;
    transform: scale(0);
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.donut-chart.visible {
    transform: scale(1);
}

.donut-chart svg {
    transform: rotate(-90deg);
}

.donut-seg {
    transition: stroke-dasharray 1.2s ease;
}

.donut-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.donut-number {
    display: block;
    font-family: 'Azeret Mono', monospace;
    font-weight: 400;
    font-size: 36px;
    color: var(--navy);
}

.donut-label {
    display: block;
    font-family: 'Mulish', sans-serif;
    font-size: 13px;
    color: var(--light-slate);
    margin-top: 4px;
}

.hero-tagline {
    font-family: 'Nunito', sans-serif;
    font-weight: 600;
    font-size: 18px;
    color: var(--slate);
    opacity: 0;
    transition: opacity 1s ease;
}

.hero-tagline.visible {
    opacity: 1;
}

/* Section titles */
.section-title {
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    font-size: 32px;
    color: var(--navy);
    text-align: center;
    margin-bottom: 48px;
}

/* Category Cards */
.categories {
    padding: 80px 8%;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.category-card {
    background: var(--white);
    border-radius: 12px;
    padding: 28px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.category-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease, box-shadow 0.3s ease;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.card-top {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.category-card[data-color="#38B2AC"] .card-top { background: var(--teal); }
.category-card[data-color="#E8A838"] .card-top { background: var(--amber); }
.category-card[data-color="#E76F51"] .card-top { background: var(--coral); }
.category-card[data-color="#48BB78"] .card-top { background: var(--green); }

.card-picto {
    margin-bottom: 16px;
}

.category-card h3 {
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    font-size: 18px;
    color: var(--navy);
    margin-bottom: 8px;
}

.card-value {
    font-family: 'Azeret Mono', monospace;
    font-weight: 500;
    font-size: 24px;
    color: var(--navy);
    margin-bottom: 12px;
}

.card-desc {
    font-family: 'Mulish', sans-serif;
    font-size: 14px;
    line-height: 1.7;
    color: var(--light-slate);
}

/* Tips */
.tips {
    padding: 80px 8%;
    background: var(--white);
}

.tip-list {
    max-width: 700px;
    margin: 0 auto;
}

.tip-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px 0;
    border-bottom: 1px solid var(--cloud);
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.tip-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.tip-number {
    font-family: 'Azeret Mono', monospace;
    font-size: 12px;
    color: var(--light-slate);
    flex-shrink: 0;
    padding-top: 4px;
}

.tip-content {
    flex: 1;
}

.tip-content h4 {
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    font-size: 16px;
    color: var(--navy);
    margin-bottom: 6px;
}

.tip-content p {
    font-family: 'Mulish', sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--light-slate);
}

.tip-savings {
    font-family: 'Azeret Mono', monospace;
    font-weight: 500;
    font-size: 16px;
    color: var(--green);
    flex-shrink: 0;
    padding-top: 4px;
}

/* Footer */
.footer {
    padding: 48px 24px;
    text-align: center;
    background: var(--warm-white);
}

.footer p {
    font-family: 'Mulish', sans-serif;
    font-size: 13px;
    color: var(--light-slate);
}