:root {
    --color-primary: #d32f2f;
    --color-primary-dark: #9a0007;
    --color-accent: #ff5252;
    --color-dark: #1a1a1a;
    --color-text: #2c2c2c;
    --color-muted: #6b6b6b;
    --color-bg: #ffffff;
    --color-bg-soft: #f7f5f2;
    --color-border: #e6e6e6;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --container: 1140px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    font-size: 17px;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3, h4 {
    color: var(--color-dark);
    line-height: 1.25;
    margin: 0 0 16px;
}

h2 {
    font-size: 36px;
    margin-bottom: 32px;
    text-align: center;
}

h3 {
    font-size: 22px;
}

p {
    margin: 0 0 16px;
}

.section {
    padding: 80px 0;
}

.section:nth-of-type(even) {
    background: var(--color-bg-soft);
}

/* === HERO === */
.hero {
    background: linear-gradient(135deg, #b71c1c 0%, #d32f2f 60%, #ff5252 100%);
    color: #fff;
    padding: 96px 0 80px;
    text-align: center;
}

.hero__title {
    color: #fff;
    font-size: 52px;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.hero__subtitle {
    font-size: 22px;
    opacity: 0.95;
    margin-bottom: 48px;
}

.hero__info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.info-card {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(6px);
}

.info-card__label {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
    margin-bottom: 8px;
}

.info-card__value {
    font-size: 18px;
    font-weight: 600;
}

/* === BUTTONS === */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 17px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

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

.btn--primary:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--big {
    padding: 18px 40px;
    font-size: 18px;
    width: 100%;
}

.hero__cta {
    background: #fff;
    color: var(--color-primary-dark);
}

.hero__cta:hover {
    background: #fff5f5;
}

/* === DESCRIPTION === */
.lead {
    font-size: 19px;
    max-width: 820px;
    margin: 0 auto 40px;
    text-align: center;
    color: var(--color-muted);
}

.program {
    max-width: 820px;
    margin: 0 auto;
    background: #fff;
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--color-primary);
}

.program__list {
    padding-left: 20px;
    margin: 0;
}

.program__list li {
    margin-bottom: 12px;
}

/* === INJURIES === */
.injuries {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.injury-card {
    background: #fff;
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border-top: 3px solid var(--color-primary);
    transition: transform 0.2s;
}

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

.injury-card h4 {
    font-size: 18px;
    color: var(--color-primary-dark);
}

.injury-card p {
    margin: 0;
    color: var(--color-muted);
    font-size: 15px;
}

/* === LEGAL === */
.legal {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto 32px;
}

.legal__item {
    background: #fff;
    padding: 28px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.legal__item h4 {
    color: var(--color-primary-dark);
    font-size: 18px;
}

.legal__item p {
    margin: 0;
    color: var(--color-muted);
}

.legal__note {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: var(--color-muted);
    font-style: italic;
}

/* === HERO IMAGE === */
.section--image {
    padding: 0;
}

.hero-image {
    position: relative;
    height: 520px;
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.55), rgba(155, 0, 0, 0.55)),
        url("https://images.unsplash.com/photo-1612277795421-9bc7706a4a34?auto=format&fit=crop&w=1600&q=80");
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
}

.hero-image__overlay {
    max-width: 800px;
    padding: 0 24px;
}

.hero-image__overlay h2 {
    color: #fff;
    font-size: 44px;
    margin-bottom: 16px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
}

.hero-image__overlay p {
    font-size: 20px;
    margin: 0;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

/* === INSTRUCTORS === */
.instructors {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.instructor {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    text-align: center;
    padding-bottom: 24px;
}

.instructor__photo {
    width: 100%;
    height: 280px;
    background-size: cover;
    background-position: center;
    background-color: #d0d0d0;
}

.instructor__photo--1 {
    background-image: url("https://images.unsplash.com/photo-1612349317150-e413f6a5b16d?auto=format&fit=crop&w=600&q=80");
}

.instructor__photo--2 {
    background-image: url("https://images.unsplash.com/photo-1559839734-2b71ea197ec2?auto=format&fit=crop&w=600&q=80");
}

.instructor__photo--3 {
    background-image: url("https://images.unsplash.com/photo-1622253692010-333f2da6031d?auto=format&fit=crop&w=600&q=80");
}

.instructor h3 {
    margin: 20px 0 4px;
    font-size: 22px;
}

.instructor__role {
    color: var(--color-primary-dark);
    font-weight: 600;
    margin: 0 0 16px;
}

.instructor__credits {
    list-style: none;
    padding: 0 24px;
    margin: 0;
    text-align: left;
}

.instructor__credits li {
    position: relative;
    padding-left: 22px;
    margin-bottom: 8px;
    color: var(--color-muted);
    font-size: 15px;
}

.instructor__credits li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* === PRICING === */
.pricing {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 56px;
}

.tariff {
    position: relative;
    background: #fff;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.tariff:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.tariff--featured {
    border-color: var(--color-primary);
    transform: scale(1.03);
}

.tariff__badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tariff__price {
    font-size: 36px;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin: 16px 0 24px;
}

.tariff ul {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
}

.tariff ul li {
    padding: 8px 0 8px 26px;
    position: relative;
    border-bottom: 1px solid var(--color-border);
}

.tariff ul li:last-child {
    border-bottom: none;
}

.tariff ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* === FORM === */
.signup-form {
    max-width: 720px;
    margin: 0 auto;
    background: #fff;
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

.signup-form h3 {
    text-align: center;
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.signup-form label {
    display: flex;
    flex-direction: column;
}

.signup-form label > span {
    font-size: 14px;
    color: var(--color-muted);
    margin-bottom: 6px;
}

.signup-form input,
.signup-form select {
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.15s;
    background: #fff;
}

.signup-form input:focus,
.signup-form select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.signup-form input.invalid,
.signup-form select.invalid {
    border-color: var(--color-primary);
    background: #fff5f5;
}

.checkbox {
    flex-direction: row !important;
    align-items: center;
    gap: 10px;
    margin: 8px 0 20px;
    font-size: 14px;
    color: var(--color-muted);
}

.checkbox input {
    width: 18px;
    height: 18px;
    margin: 0;
}

.form-message {
    margin-top: 16px;
    padding: 14px 18px;
    border-radius: 8px;
    font-weight: 500;
    text-align: center;
}

.form-message--success {
    background: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

.form-message--error {
    background: #ffebee;
    color: #c62828;
    border: 1px solid #ef9a9a;
}

/* === FOOTER === */
.footer {
    background: var(--color-dark);
    color: #999;
    padding: 24px 0;
    text-align: center;
    font-size: 14px;
}

.footer p {
    margin: 0;
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
    h2 { font-size: 28px; }
    .hero__title { font-size: 36px; }
    .hero-image__overlay h2 { font-size: 30px; }
    .hero__info,
    .injuries,
    .legal,
    .instructors,
    .pricing,
    .form-row {
        grid-template-columns: 1fr;
    }
    .injuries { grid-template-columns: repeat(2, 1fr); }
    .tariff--featured { transform: none; }
    .section { padding: 56px 0; }
}

@media (max-width: 560px) {
    .injuries { grid-template-columns: 1fr; }
    .signup-form,
    .program { padding: 24px; }
    .hero { padding: 64px 0 56px; }
    .hero__title { font-size: 28px; }
}