/* 
 * 500 Milhas de Kart 2026 - Teaser Site
 * Estilos CSS - Design Moderno com Tema Escuro
 */

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

:root {
    --primary-color: #c41e3a;
    --primary-dark: #8b1628;
    --bg-dark: #0a0e27;
    --bg-darker: #050810;
    --text-light: #ffffff;
    --text-muted: #b0b0b0;
    --border-color: #2a2a3e;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
}

html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 14, 39, 0.85) 0%, rgba(5, 8, 16, 0.9) 100%);
    z-index: 2;
    pointer-events: none;
}

.video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 1200px;
    width: 100%;
    padding: 40px;
}

.logo {
    max-width: 400px;
    width: 100%;
    margin-bottom: 40px;
    animation: fadeInDown 1s ease-out;
}

.logo img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(196, 30, 58, 0.3));
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-light);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.7);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 40px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out 0.4s both;
}

/* ===== CHAMPIONSHIP INFO ===== */
.championship-info {
    background: linear-gradient(135deg, rgba(196, 30, 58, 0.1) 0%, rgba(139, 22, 40, 0.1) 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
    margin-bottom: 60px;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.info-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.stages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.stage-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.stage-card:hover {
    background: rgba(196, 30, 58, 0.15);
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.stage-date {
    font-size: 1.3rem;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 10px;
}

.stage-distance {
    font-size: 1.1rem;
    color: var(--text-muted);
}

.total-distance {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    font-size: 1.3rem;
    color: var(--text-light);
}

.total-distance strong {
    color: var(--primary-color);
    font-size: 1.5rem;
}

/* ===== FORM SECTION ===== */
.form-section {
    background: linear-gradient(135deg, rgba(42, 42, 62, 0.3) 0%, rgba(10, 14, 39, 0.5) 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 50px 40px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out 0.8s both;
}

.form-title {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    text-align: center;
}

.form-subtitle {
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 30px;
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    background-color: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-light);
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    background-color: rgba(255, 255, 255, 0.12);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

.form-group select {
    cursor: pointer;
}

.form-group select option {
    background-color: var(--bg-dark);
    color: var(--text-light);
}

/* Campo de quantidade de karts - inicialmente oculto */
.form-group.hidden {
    display: none;
    animation: slideDown 0.3s ease-out;
}

.form-group.hidden.show {
    display: block;
}

.form-group input[type="number"] {
    appearance: textfield;
}

.form-group input[type="number"]::-webkit-outer-spin-button,
.form-group input[type="number"]::-webkit-inner-spin-button {
    appearance: none;
    margin: 0;
}

/* ===== BUTTON ===== */
.submit-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-light);
    border: none;
    border-radius: 6px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(196, 30, 58, 0.3);
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(196, 30, 58, 0.5);
}

.submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ===== FEEDBACK MESSAGES ===== */
.message {
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
    display: none;
    animation: slideDown 0.3s ease-out;
}

.message.show {
    display: block;
}

.message.success {
    background-color: rgba(16, 185, 129, 0.15);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.message.error {
    background-color: rgba(239, 68, 68, 0.15);
    border: 1px solid var(--error-color);
    color: var(--error-color);
}

.message.warning {
    background-color: rgba(245, 158, 11, 0.15);
    border: 1px solid var(--warning-color);
    color: var(--warning-color);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
        overflow: hidden;
    }
    to {
        opacity: 1;
        max-height: 500px;
    }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .logo {
        max-width: 300px;
        margin-bottom: 30px;
    }

    .championship-info {
        padding: 30px 20px;
    }

    .form-section {
        padding: 30px 20px;
    }

    .stages-grid {
        grid-template-columns: 1fr;
    }

    .info-title {
        font-size: 1.5rem;
    }

    .form-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: 100vh;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .logo {
        max-width: 250px;
        margin-bottom: 20px;
    }

    .hero-content {
        padding: 20px;
    }

    .championship-info {
        padding: 20px 15px;
        margin-bottom: 40px;
    }

    .form-section {
        padding: 20px 15px;
        border-radius: 8px;
    }

    .form-title {
        font-size: 1.3rem;
    }

    .form-group {
        margin-bottom: 20px;
    }

    .form-group input,
    .form-group select {
        padding: 10px 12px;
        font-size: 16px; /* Evita zoom no iOS */
    }
}

/* ===== LOADING STATE ===== */
.submit-btn.loading {
    position: relative;
    color: transparent;
}

.submit-btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--text-light);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}