/* ==========================================================================
   Sistema POS - Login Page (Centered Card)
   ========================================================================== */

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

body {
    min-height: 100vh;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* ── Full-screen gradient background ── */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, #1e2235 0%, #2a2f4a 50%, #1e2235 100%);
    padding: 20px;
    position: relative;
    overflow: hidden;
}

/* Decorative gradient circles */
.login-container::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(67, 97, 238, 0.18) 0%, transparent 70%);
    top: -120px;
    right: -100px;
}

.login-container::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.12) 0%, transparent 70%);
    bottom: -80px;
    left: -60px;
}

/* ── Login Card ── */
.login-card {
    width: 100%;
    max-width: 460px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4);
    position: relative;
    z-index: 1;
    border: none;
}

/* ── Card Header: Branding ── */
.login-card .card-header {
    background: linear-gradient(135deg, #4361ee, #7c3aed);
    border-bottom: none;
    text-align: center;
    padding: 36px 32px 32px;
}

.login-card .card-header .brand-icon {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    backdrop-filter: blur(4px);
}

.login-card .card-header .brand-icon i {
    font-size: 1.8rem;
    color: #ffffff;
}

.login-card .card-header h2 {
    color: #ffffff;
    font-weight: 800;
    font-size: 1.6rem;
    margin: 0 0 6px;
    letter-spacing: -0.02em;
}

.login-card .card-header p {
    color: rgba(255, 255, 255, 0.65);
    margin: 0;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
}

/* ── Card Body: Form ── */
.login-card .card-body {
    background: #ffffff;
    padding: 36px 32px;
}

/* Form groups */
.form-group {
    margin-bottom: 22px;
}

.form-label {
    font-weight: 600;
    font-size: 0.92rem;
    color: #2a2f3b;
    margin-bottom: 8px;
    display: block;
}

.input-group {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: box-shadow 0.25s ease;
}

.input-group:focus-within {
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

.input-group-text {
    background: #f8f9fc;
    border: 2px solid #e8ecf1;
    border-right: none;
    border-radius: 12px 0 0 12px;
    color: #7c8293;
    padding: 12px 14px;
    font-size: 1.1rem;
}

.form-control {
    border: 2px solid #e8ecf1;
    border-left: none;
    border-radius: 0 12px 12px 0;
    padding: 12px 14px;
    font-size: 1rem;
    color: #2a2f3b;
    transition: border-color 0.2s;
}

.form-control:focus {
    border-color: #4361ee;
    box-shadow: none;
}

.input-group:focus-within .input-group-text {
    border-color: #4361ee;
    color: #4361ee;
}

.field-error {
    color: #f35757;
    font-size: 0.82rem;
    margin-top: 6px;
    font-weight: 500;
}

/* Options row */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.form-check-label {
    font-size: 0.88rem;
    color: #5a6072;
    font-weight: 500;
}

.form-check-input {
    border-radius: 4px;
    border: 2px solid #c8cdd6;
    width: 18px;
    height: 18px;
}

.form-check-input:checked {
    background-color: #4361ee;
    border-color: #4361ee;
}

.forgot-link {
    font-size: 0.88rem;
    color: #4361ee;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.2s;
}

.forgot-link:hover {
    color: #7c3aed;
}

/* Submit button */
.btn-login {
    width: 100%;
    background: linear-gradient(135deg, #4361ee, #7c3aed);
    border: none;
    padding: 14px 24px;
    font-weight: 700;
    font-size: 1.05rem;
    border-radius: 12px;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.01em;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(67, 97, 238, 0.4);
    color: white;
}

.btn-login:active {
    transform: translateY(0);
}

.btn-login i {
    font-size: 1.15rem;
    transition: transform 0.3s ease;
}

.btn-login:hover i {
    transform: translateX(4px);
}

/* ── Card Footer ── */
.login-card .card-footer {
    background: #f8f9fc;
    border-top: 1px solid #e8ecf1;
    text-align: center;
    padding: 16px 32px;
}

.login-card .card-footer small {
    color: #7c8293;
    font-size: 0.8rem;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 10px;
    padding: 12px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 22px;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 575.98px) {
    .login-container {
        padding: 16px;
    }

    .login-card .card-header {
        padding: 28px 24px 24px;
    }

    .login-card .card-header h2 {
        font-size: 1.35rem;
    }

    .login-card .card-body {
        padding: 28px 24px;
    }

    .form-options {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }
}