:root {
    --primary: #1E40AF;
    --primary-light: #3B82F6;
    --bg-gradient: radial-gradient(circle at top right, #eff6ff, #ffffff, #f1f5f9);
    --surface: rgba(255, 255, 255, 0.95);
    --text-main: #0F172A;
    --text-muted: #64748B;
    --error: #dc2626;
    --info: #2563eb;
    --radius-xl: 24px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    overflow-x: hidden;
}

@keyframes fadeInUp {

    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.login-container {
    width: 92%;
    max-width: 420px;
    animation: fadeInUp 0.6s ease-out;
}

.login-card {
    background: var(--surface);
    backdrop-filter: blur(10px);
    padding: 48px 32px;
    border-radius: var(--radius-xl);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.7);
    position: relative;
}

.brand-section {
    margin-bottom: 32px;
    text-align: center;
}

.brand-logo {
    width: 68px;
    height: 68px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    margin: 0 auto 16px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
    box-shadow: 0 12px 20px -5px rgba(30, 64, 175, 0.4);
}

h2 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 26px;
    font-weight: 800;
    margin: 0;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 8px;
}

.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group i.main-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    z-index: 2;
    transition: var(--transition);
}

input {
    width: 100%;
    padding: 18px 18px 18px 52px;
    border-radius: var(--radius-lg);
    border: 1.5px solid #E2E8F0;
    background: #F8FAFC;
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    outline: none;
}

input:focus {
    background: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.input-group label {
    position: absolute;
    left: 52px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition);
    font-size: 15px;
}

input:focus ~ label,
input:not(:placeholder-shown) ~ label {
    top: -10px;
    left: 12px;
    font-size: 12px;
    font-weight: 700;
    background: white;
    padding: 0 8px;
    color: var(--primary);
    border-radius: 4px;
}

.toggle-password {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
}

.btn-login {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(30, 64, 175, 0.3);
}

.alert {
    padding: 14px 16px;
    border-radius: var(--radius-lg);
    font-size: 13px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-danger {
    background: #fff1f2;
    color: var(--error);
    border-left: 4px solid var(--error);
}

.alert-info {
    background: #eff6ff;
    color: var(--info);
    border-left: 4px solid var(--info);
}

.extras {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 16px 0 24px;
    font-size: 13px;
}

.forgot-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
}

.divider {
    height: 1px;
    background: #E2E8F0;
    margin: 32px 0 24px;
}

.footer-text {
    font-size: 14px;
    color: var(--text-muted);
    text-align: center;
}

.footer-text a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
}

.trust-badge {
    margin-top: 24px;
    font-size: 11px;
    color: #94A3B8;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-card {
    background: white;
    width: 90%;
    max-width: 400px;
    padding: 30px;
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
    position: relative;
    animation: fadeInUp 0.4s ease;
}

.modal-header {
    margin-bottom: 20px;
    text-align: center;
}

.modal-header h3 {
    margin: 0;
    font-family: 'Plus Jakarta Sans';
    color: var(--text-main);
}

.modal-input {
    width: 100%;
    padding: 14px;
    margin-bottom: 15px;
    border: 1.5px solid #E2E8F0;
    border-radius: 12px;
    font-size: 14px;
    outline: none;
}

.btn-whatsapp {
    background: #25D366;
    color: white;
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    cursor: pointer;
    color: var(--text-muted);
}

.spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}