/**
 * Login / register / reset — theme-aware auth shell (Impact Elements gradient + grid).
 */
:root,
[data-theme="light"] {
    --auth-surface-bg: #f8f9fb;
    --auth-gradient-hero:
        radial-gradient(ellipse at 18% 45%, rgba(206, 24, 30, 0.12) 0%, transparent 58%),
        radial-gradient(ellipse at 82% 18%, rgba(206, 24, 30, 0.07) 0%, transparent 48%),
        radial-gradient(ellipse at 50% 100%, rgba(15, 17, 23, 0.04) 0%, transparent 50%),
        linear-gradient(165deg, #fafbfc 0%, #eef1f7 45%, #faf6f7 100%);
    --auth-grid-line: rgba(0, 0, 0, 0.055);
    --auth-grid-mask: radial-gradient(ellipse at center, black 22%, transparent 72%);
    --auth-card-bg: #ffffff;
    --auth-card-text: #1a1d27;
    --auth-card-muted: #6c757d;
    --auth-card-border: rgba(0, 0, 0, 0.06);
    --auth-card-shadow: 0 20px 50px rgba(15, 17, 23, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.04);
    --auth-input-bg: #f8f9fa;
    --auth-input-border: #e0e0e0;
    --auth-input-text: #1a1d27;
    --auth-toggle-border: rgba(0, 0, 0, 0.08);
    --auth-toggle-bg: rgba(255, 255, 255, 0.92);
    --auth-toggle-text: #5c6370;
}

[data-theme="dark"] {
    --auth-surface-bg: #0a0c10;
    --auth-gradient-hero:
        radial-gradient(ellipse at 20% 50%, rgba(206, 24, 30, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(206, 24, 30, 0.08) 0%, transparent 50%);
    --auth-grid-line: rgba(255, 255, 255, 0.03);
    --auth-grid-mask: radial-gradient(ellipse at center, black 30%, transparent 80%);
    --auth-card-bg: #1e1e2e;
    --auth-card-text: #f0f0f5;
    --auth-card-muted: #b8b8c8;
    --auth-card-border: rgba(255, 255, 255, 0.06);
    --auth-card-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
    --auth-input-bg: #252536;
    --auth-input-border: #3a3a4e;
    --auth-input-text: #f0f0f5;
    --auth-toggle-border: rgba(255, 255, 255, 0.12);
    --auth-toggle-bg: rgba(26, 29, 39, 0.88);
    --auth-toggle-text: #9aa3b8;
}

body.auth-page {
    position: relative;
    background-color: var(--auth-surface-bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 24px 16px;
    overflow: hidden;
}

/* Tall forms (register, etc.) — centered when short, scrollable when tall */
body.auth-page.auth-page--scrollable {
    overflow-x: hidden;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 40px 16px 48px;
}

body.auth-page.auth-page--scrollable > .register-card,
body.auth-page.auth-page--scrollable > .login-card,
body.auth-page.auth-page--scrollable > .auth-card {
    margin-top: auto;
    margin-bottom: auto;
    flex-shrink: 0;
}

body.auth-page::before {
    content: "";
    position: fixed;
    inset: 0;
    background: var(--auth-gradient-hero);
    pointer-events: none;
    z-index: 0;
}

body.auth-page::after {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--auth-grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--auth-grid-line) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: var(--auth-grid-mask);
    pointer-events: none;
    z-index: 0;
}

.auth-card,
.login-card,
.register-card {
    background-color: var(--auth-card-bg);
    border: 1px solid var(--auth-card-border);
    border-radius: 16px;
    box-shadow: var(--auth-card-shadow);
    width: 100%;
    max-width: 420px;
    padding: 40px;
    position: relative;
    z-index: 1;
    color: var(--auth-card-text);
}

.register-card {
    max-width: 650px;
}

.auth-card .form-control,
.auth-card .form-select,
.login-card .form-control,
.login-card .form-select,
.register-card .form-control,
.register-card .form-select {
    background-color: var(--auth-input-bg);
    border: 1px solid var(--auth-input-border);
    color: var(--auth-input-text);
    padding: 12px 16px;
    border-radius: 8px;
}

.auth-card .form-control:focus,
.auth-card .form-select:focus,
.login-card .form-control:focus,
.login-card .form-select:focus,
.register-card .form-control:focus,
.register-card .form-select:focus {
    background-color: var(--auth-input-bg);
    border-color: #ce181e;
    box-shadow: 0 0 0 0.25rem rgba(206, 24, 30, 0.15);
    color: var(--auth-input-text);
}

.auth-card .form-label,
.login-card .form-label,
.register-card .form-label {
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
    color: var(--auth-card-muted);
}

.auth-card .text-secondary,
.login-card .text-secondary,
.register-card .text-secondary,
.auth-card .text-muted,
.login-card .text-muted,
.register-card .text-muted {
    color: var(--auth-card-muted) !important;
}

.auth-card .section-title,
.register-card .section-title {
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--auth-card-text);
    letter-spacing: 1px;
    border-bottom: 2px solid var(--auth-input-border);
    padding-bottom: 8px;
    margin-bottom: 20px;
    margin-top: 10px;
}

.register-card .bg-light {
    background-color: var(--auth-input-bg) !important;
    border-color: var(--auth-input-border) !important;
    color: var(--auth-card-text);
}

.btn-brand {
    background-color: #ce181e;
    color: #fff;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 14px;
    border: none;
    border-radius: 8px;
    transition: all 0.3s ease-in-out;
}

.btn-brand:hover {
    background-color: #a81318;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(206, 24, 30, 0.35);
}

.auth-theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 1000;
    border: 1px solid var(--auth-toggle-border);
    background: var(--auth-toggle-bg);
    color: var(--auth-toggle-text);
    border-radius: 999px;
    padding: 8px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    backdrop-filter: blur(12px);
}

.auth-theme-toggle:hover {
    border-color: #ce181e;
    color: #ce181e;
}

/* Impact Elements — theme-aware partner logo */
.impact-elements-logo--dark {
    display: none;
}

[data-theme="dark"] .impact-elements-logo--light {
    display: none;
}

[data-theme="dark"] .impact-elements-logo--dark {
    display: inline-block;
}

.impact-elements-brand {
    display: inline-block;
    line-height: 0;
}

.impact-elements-brand .impact-elements-logo {
    object-fit: contain;
    opacity: 0.8;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.impact-elements-brand:hover .impact-elements-logo {
    opacity: 1;
    transform: scale(1.05);
}

[data-theme="dark"] .impact-elements-brand .impact-elements-logo--dark {
    opacity: 0.92;
}

[data-theme="dark"] .impact-elements-brand:hover .impact-elements-logo--dark {
    opacity: 1;
}

.impact-elements-logo--sm {
    max-height: 35px;
}

.impact-elements-logo--md {
    max-height: 50px;
}

/* Register — terms acceptance modal */
.terms-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 10000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.terms-modal-overlay.active {
    display: flex;
}

.terms-modal {
    background-color: var(--auth-card-bg);
    color: var(--auth-card-text);
    border-radius: 16px;
    max-width: 600px;
    width: 100%;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: authModalSlideIn 0.3s ease-out;
}

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

.terms-modal-header {
    padding: 24px 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.terms-modal-header h5 {
    margin: 0;
    color: var(--auth-card-text);
    font-weight: 700;
}

.terms-modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--auth-card-muted);
    padding: 0;
    line-height: 1;
}

.terms-modal-close:hover {
    color: var(--auth-card-text);
}

.terms-modal-body {
    padding: 20px 24px;
    overflow-y: auto;
    flex: 1;
}

.terms-modal-body h6 {
    color: var(--auth-card-text);
    margin-top: 20px;
    margin-bottom: 10px;
    font-weight: 700;
}

.terms-modal-body h6:first-child {
    margin-top: 0;
}

.terms-modal-body p,
.terms-modal-body li {
    font-size: 14px;
    line-height: 1.7;
    color: var(--auth-card-muted);
    margin-bottom: 10px;
}

.terms-modal-body ul {
    padding-left: 20px;
}

.terms-modal-footer {
    padding: 20px 24px;
    border-top: 1px solid var(--auth-input-border);
    background-color: var(--auth-input-bg);
    border-radius: 0 0 16px 16px;
}

.terms-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.terms-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    accent-color: #ce181e;
}

.terms-checkbox label {
    font-size: 14px;
    color: var(--auth-card-text);
    line-height: 1.5;
}

.terms-checkbox label a {
    color: #ce181e;
    text-decoration: none;
}

.terms-checkbox label a:hover {
    text-decoration: underline;
}

.terms-modal-actions {
    display: flex;
    gap: 12px;
}

.terms-modal-actions .btn {
    flex: 1;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
}

.terms-modal-actions .btn-outline-secondary {
    background-color: var(--auth-card-bg);
    border: 1px solid var(--auth-input-border);
    color: var(--auth-card-text);
}

.terms-modal-actions .btn-outline-secondary:hover {
    background-color: var(--auth-input-bg);
}

/* Reset password page */
.reset-container .card-body {
    background-color: var(--auth-card-bg);
    color: var(--auth-card-text);
}

.reset-container .form-label {
    color: var(--auth-card-muted);
}

.reset-container .form-control {
    background-color: var(--auth-input-bg);
    border-color: var(--auth-input-border);
    color: var(--auth-input-text);
}

.reset-container .form-control:focus {
    background-color: var(--auth-input-bg);
    color: var(--auth-input-text);
}

.reset-container .password-strength {
    background-color: var(--auth-input-border);
}

.reset-container .password-strength-text {
    color: var(--auth-card-muted);
}

.reset-container .input-group-text {
    background-color: var(--auth-input-bg);
    border-color: var(--auth-input-border);
    color: var(--auth-input-text);
}