/* ======================================
   StatsAlpha Signup Page Styles
   ====================================== */

/* ─────── Container & Background ─────── */
.signup-container {
    min-height: 100vh;
    background: linear-gradient(135deg,
            var(--surface-0) 0%,
            var(--surface-1) 50%,
            var(--surface-2) 100%);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.signup-container::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--bs-primary-100) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.signup-container::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--bs-secondary-100) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

/* ─────── Signup Card ─────── */
#signup-card {
    border-radius: 16px;
    border: none;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.98);
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.6s ease-out;
    max-width: 480px;
    width: 100%;
}

[data-bs-theme="dark"] #signup-card {
    background: rgba(17, 24, 39, 0.95);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

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

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

/* ─────── Back Link ─────── */
.back-link {
    font-size: 14px;
    color: var(--bs-body-color);
    opacity: 0.7;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.back-link:hover {
    opacity: 1;
    color: var(--bs-primary);
    transform: translateX(-4px);
}

/* ─────── Headings ─────── */
.signup-title {
    font-family: var(--font-family-b);
    font-weight: 600;
    font-size: 28px;
    color: var(--bs-body-color);
    margin-bottom: 8px;
}

.signup-subtitle {
    font-family: var(--font-family-a);
    font-size: 15px;
    color: var(--bs-muted);
    font-weight: 400;
    margin-bottom: 24px;
}

/* ─────── Social Login Button ─────── */
.btn-google {
    border: 1.5px solid var(--bs-border-color);
    background: var(--surface-0);
    color: var(--bs-body-color);
    font-family: var(--font-family-a);
    font-weight: 500;
    padding: 12px 16px;
    border-radius: 10px;
    transition: all 0.2s ease;
}

.btn-google:hover {
    border-color: var(--bs-primary);
    background: var(--bs-primary-100);
    color: var(--bs-primary-700);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.btn-google img {
    width: 20px;
    height: 20px;
}

/* ─────── Divider ─────── */
.divider-container {
    display: flex;
    align-items: center;
    margin: 24px 0;
}

.divider-line {
    flex: 1;
    height: 1px;
    background: var(--bs-border-color);
    opacity: 0.5;
}

.divider-text {
    padding: 0 16px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--bs-muted);
}

/* ─────── Form Row (Two-column names) ─────── */
.form-row-dual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

@media (max-width: 480px) {
    .form-row-dual {
        grid-template-columns: 1fr;
    }
}

/* ─────── Form Elements ─────── */
.form-label {
    font-family: var(--font-family-b);
    font-weight: 600;
    font-size: 14px;
    color: var(--bs-body-color);
    margin-bottom: 8px;
}

.form-control {
    border-radius: 10px;
    border: 1.5px solid var(--bs-border-color);
    padding: 12px 16px;
    font-size: 15px;
    transition: all 0.2s ease;
    background: var(--surface-0);
    color: var(--bs-body-color);
    font-family: var(--font-family-a);
}

.form-control:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 4px var(--bs-primary-100);
    background: var(--surface-0);
}

.form-control::placeholder {
    color: var(--bs-muted);
    opacity: 0.6;
}

/* ─────── Input Group (Password Toggle) ─────── */
.input-group .btn-outline-secondary {
    border: 1.5px solid var(--bs-border-color);
    border-left: none;
    border-radius: 0 10px 10px 0;
    background: var(--surface-0);
    color: var(--bs-muted);
    transition: all 0.2s ease;
}

.input-group .btn-outline-secondary:hover {
    background: var(--bs-primary-100);
    border-color: var(--bs-primary);
    color: var(--bs-primary);
}

.input-group .form-control {
    border-right: none;
    border-radius: 10px 0 0 10px;
}

.input-group .form-control:focus + .btn-outline-secondary {
    border-color: var(--bs-primary);
}

/* ─────── Password Strength Meter ─────── */
.strength-container {
    margin-top: 12px;
}

.strength-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--bs-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.progress {
    height: 6px;
    border-radius: 3px;
    background: var(--bs-secondary-bg);
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-bar {
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* ─────── Password Requirements Checklist ─────── */
#pw-requirements {
    background: var(--bs-primary-100);
    border-left: 4px solid var(--bs-primary);
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 13px;
    line-height: 1.6;
}

[data-bs-theme="dark"] #pw-requirements {
    background: rgba(59, 130, 246, 0.1);
    border-left-color: var(--bs-primary);
}

#pw-requirements ul {
    margin: 0;
    padding-left: 20px;
}

#pw-requirements li {
    color: var(--bs-muted);
    transition: color 0.2s ease;
}

#pw-requirements li.text-success {
    color: var(--bs-success);
    font-weight: 600;
}

.pw-requirement-section {
    margin-bottom: 12px;
}

.pw-requirement-heading {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--bs-muted);
    margin-bottom: 6px;
    display: block;
}

.pw-requirement-section ul {
    margin: 0;
    padding-left: 20px;
}

/* ─────── Checkbox & Links ─────── */
.form-check-input {
    border-radius: 6px;
    border: 1.5px solid var(--bs-border-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.form-check-input:checked {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.form-check-input:focus {
    box-shadow: 0 0 0 4px var(--bs-primary-100);
}

.form-check-label {
    font-size: 14px;
    color: var(--bs-body-color);
    cursor: pointer;
    user-select: none;
    font-family: var(--font-family-a);
}

/* ─────── Terms & Privacy Notice ─────── */
.terms-notice {
    font-size: 13px;
    color: var(--bs-muted);
    line-height: 1.6;
    text-align: center;
    margin-bottom: 20px;
}

.terms-notice a {
    color: var(--bs-primary);
    font-weight: 500;
    transition: all 0.2s ease;
    text-decoration: none;
}

.terms-notice a:hover {
    color: var(--bs-primary-700);
    text-decoration: underline;
}

/* ─────── Submit Button ─────── */
.btn-primary {
    background: linear-gradient(135deg, var(--bs-primary) 0%, var(--bs-primary-700) 100%);
    border: none;
    border-radius: 10px;
    padding: 12px 24px;
    font-family: var(--font-family-b);
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
    background: linear-gradient(135deg, var(--bs-primary-700) 0%, var(--bs-primary) 100%);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

/* ─────── Sign In Link ─────── */
.signin-prompt {
    font-size: 14px;
    color: var(--bs-muted);
    text-align: center;
}

.signin-prompt a {
    color: var(--bs-primary);
    font-weight: 600;
    transition: all 0.2s ease;
    text-decoration: none;
}

.signin-prompt a:hover {
    color: var(--bs-primary-700);
    text-decoration: underline;
}

/* ─────── Error Alerts ─────── */
.alert {
    border-radius: 10px;
    border: none;
    padding: 12px 16px;
    font-size: 14px;
    margin-bottom: 20px;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--bs-danger);
    border-left: 4px solid var(--bs-danger);
}

.invalid-feedback {
    font-size: 13px;
    margin-top: 6px;
}

/* ─────── Responsive Adjustments ─────── */
@media (max-width: 576px) {
    .signup-container {
        padding: 20px;
    }

    #signup-card {
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    }

    .signup-title {
        font-size: 24px;
    }

    .signup-subtitle {
        font-size: 14px;
    }

    #signup-card .card-body {
        padding: 24px !important;
    }
}

/* ─────── Dark Mode Enhancements ─────── */
[data-bs-theme="dark"] .signup-container {
    background: linear-gradient(135deg,
            var(--bg-dark) 0%,
            var(--bg) 50%,
            var(--bg-light) 100%);
}

[data-bs-theme="dark"] .form-control {
    background: var(--surface-1);
    border-color: var(--border-muted);
    color: var(--text);
}

[data-bs-theme="dark"] .form-control:focus {
    background: var(--surface-1);
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

[data-bs-theme="dark"] .btn-google {
    background: var(--surface-1);
    border-color: var(--border-muted);
}

[data-bs-theme="dark"] .btn-google:hover {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--bs-primary);
}

[data-bs-theme="dark"] .input-group .btn-outline-secondary {
    background: var(--surface-1);
    border-color: var(--border-muted);
}

[data-bs-theme="dark"] .input-group .btn-outline-secondary:hover {
    background: rgba(59, 130, 246, 0.15);
}

/* ─────── Accessibility Focus States ─────── */
.btn:focus-visible,
.form-control:focus-visible,
.form-check-input:focus-visible {
    outline: 2px solid var(--bs-primary);
    outline-offset: 2px;
}