/* =========================
   VARIÁVEIS (LIGHT / DARK)
========================= */
:root {
    --bg: #eef2f7;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #d1d5db;
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --success: #16a34a;
    --danger: #dc2626;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f172a;
        --card: #020617;
        --text: #e5e7eb;
        --muted: #9ca3af;
        --border: #334155;
    }
}

/* =========================
   BASE
========================= */
* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
}

body {
    margin: 0;
    background: linear-gradient(135deg, var(--bg), #c7d2fe);
    color: var(--text);
}

/* =========================
   CONTAINER
========================= */
.container {
    max-width: 900px;
    margin: 80px auto;
    background: var(--card);
    border-radius: 16px;
    padding: 35px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    animation: fadeIn 0.5s ease;
}

h1 {
    text-align: center;
    margin-bottom: 25px;
}

/* =========================
   PROGRESSO
========================= */
.progress {
    height: 6px;
    background: #e5e7eb;
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 30px;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    transition: width 0.3s ease;
}

/* =========================
   GRID (2 COLUNAS)
========================= */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    position: relative;
    display: flex;
    flex-direction: column;
}

/* =========================
   ÍCONES
========================= */
.form-group span {
    position: absolute;
    left: 12px;
    top: 38px;
    font-size: 16px;
    opacity: 0.6;
}

/* =========================
   INPUTS
========================= */
input, select {
    padding: 12px 14px 12px 40px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    font-size: 14px;
    transition: all 0.25s ease;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.2);
}

/* =========================
   VALIDAÇÃO
========================= */
input.valid {
    border-color: var(--success);
}

input.invalid {
    border-color: var(--danger);
}

/* =========================
   BOTÃO
========================= */
button {
    margin-top: 30px;
    padding: 14px;
    border-radius: 10px;
    border: none;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: all .3s ease;
}

button:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(37,99,235,.35);
}

/* =========================
   RESPONSIVO
========================= */
@media (max-width: 700px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
}

/* =========================
   ANIMAÇÃO
========================= */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}