/* ============================================
   3d3k 论坛 - 密码重置系统 样式表
   匹配 NodeBB brite (Bootswatch) 主题
   ============================================ */

:root {
    --bs-primary: #a2e436;
    --bs-primary-rgb: 162, 228, 54;
    --bs-success: #68d391;
    --bs-danger: #f56565;
    --bs-warning: #ffc700;
    --bs-info: #22d2ed;
    --bs-light: #e9ecef;
    --bs-dark: #000;
    --bs-gray: #868e96;
    --bs-gray-100: #f8f9fa;
    --bs-gray-200: #e9ecef;
    --bs-gray-300: #dee2e6;
    --bs-gray-400: #ced4da;
    --bs-gray-500: #adb5bd;
    --bs-gray-600: #868e96;
    --bs-gray-700: #495057;
    --bs-gray-800: #343a40;
    --bs-gray-900: #212529;
    --bs-body-bg: #fff;
    --bs-body-color: #212529;
    --bs-border-radius: 0.375rem;
    --bs-border-radius-lg: 0.5rem;
    --bs-link-color: #1a6b2a;
    --bs-link-hover-color: #145521;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Noto Sans SC", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    background-color: var(--bs-gray-100);
    color: var(--bs-body-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--bs-link-color);
    text-decoration: none;
}

a:hover {
    color: var(--bs-link-hover-color);
    text-decoration: underline;
}

/* ===== Header / Navbar ===== */
.navbar {
    background-color: #fff;
    border-bottom: 1px solid var(--bs-gray-300);
    padding: 0.5rem 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,.08);
}

.navbar-inner {
    max-width: 1140px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--bs-gray-900);
    text-decoration: none;
}

.navbar-brand:hover {
    color: var(--bs-gray-900);
    text-decoration: none;
}

.navbar-brand img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.navbar-nav {
    display: flex;
    gap: 0.25rem;
    list-style: none;
    margin-left: auto;
}

.navbar-nav a {
    padding: 0.5rem 0.75rem;
    border-radius: var(--bs-border-radius);
    color: var(--bs-gray-700);
    font-size: 0.9rem;
    transition: background-color 0.15s;
}

.navbar-nav a:hover {
    background-color: var(--bs-gray-100);
    color: var(--bs-gray-900);
    text-decoration: none;
}

/* ===== Main Container ===== */
.container {
    max-width: 600px;
    margin: 2rem auto;
    padding: 0 1rem;
    flex: 1;
    width: 100%;
}

/* ===== Card ===== */
.card {
    background: #fff;
    border: 1px solid var(--bs-gray-300);
    border-radius: var(--bs-border-radius-lg);
    box-shadow: 0 1px 3px rgba(0,0,0,.08);
    overflow: hidden;
}

.card-header {
    background-color: var(--bs-gray-100);
    border-bottom: 1px solid var(--bs-gray-300);
    padding: 1rem 1.5rem;
}

.card-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--bs-gray-900);
    margin: 0;
}

.card-header p {
    font-size: 0.875rem;
    color: var(--bs-gray-600);
    margin: 0.25rem 0 0 0;
}

.card-body {
    padding: 1.5rem;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--bs-gray-200);
    margin-bottom: 1.5rem;
}

.tab-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    background: none;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--bs-gray-600);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--bs-gray-700);
    background-color: var(--bs-gray-100);
}

.tab-btn.active {
    color: #1a6b2a;
    border-bottom-color: var(--bs-primary);
    font-weight: 600;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--bs-gray-700);
    margin-bottom: 0.375rem;
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--bs-body-color);
    background-color: #fff;
    border: 1px solid var(--bs-gray-400);
    border-radius: var(--bs-border-radius);
    transition: border-color 0.15s, box-shadow 0.15s;
    outline: none;
}

.form-control:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.2rem rgba(162,228,54,.25);
}

.form-control::placeholder {
    color: var(--bs-gray-500);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--bs-border-radius);
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--bs-primary);
    color: #000;
    border-color: var(--bs-primary);
}

.btn-primary:hover:not(:disabled) {
    background-color: #8bc42e;
    border-color: #7fb828;
    color: #000;
}

.btn-secondary {
    background-color: #fff;
    color: var(--bs-gray-700);
    border-color: var(--bs-gray-400);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bs-gray-100);
}

.btn-success {
    background-color: var(--bs-success);
    color: #fff;
    border-color: var(--bs-success);
}

.btn-success:hover:not(:disabled) {
    background-color: #57c782;
    border-color: #4db878;
    color: #fff;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn + .btn {
    margin-left: 0.5rem;
}

/* ===== Alerts ===== */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--bs-border-radius);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    border: 1px solid transparent;
}

.alert-success {
    background-color: #e1f6e9;
    border-color: #c3edd3;
    color: #2a543a;
}

.alert-danger {
    background-color: #fde0e0;
    border-color: #fbc1c1;
    color: #622828;
}

.alert-warning {
    background-color: #fff4cc;
    border-color: #ffe999;
    color: #665000;
}

.alert-info {
    background-color: #d3f6fb;
    border-color: #a7edf8;
    color: #0e545f;
}

/* ===== Code Input (6-digit) ===== */
.code-input-group {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin: 1.5rem 0;
}

.code-input {
    width: 48px;
    height: 56px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    border: 2px solid var(--bs-gray-300);
    border-radius: var(--bs-border-radius);
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
    background: #fff;
}

.code-input:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.2rem rgba(162,228,54,.25);
}

/* ===== File Upload ===== */
.file-upload-area {
    border: 2px dashed var(--bs-gray-400);
    border-radius: var(--bs-border-radius-lg);
    padding: 2rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bs-gray-100);
}

.file-upload-area:hover {
    border-color: var(--bs-primary);
    background: rgba(162,228,54,.05);
}

.file-upload-area.dragover {
    border-color: var(--bs-primary);
    background: rgba(162,228,54,.1);
}

.file-upload-area input[type="file"] {
    display: none;
}

.file-upload-icon {
    font-size: 2.5rem;
    color: var(--bs-gray-500);
    margin-bottom: 0.5rem;
}

.file-upload-text {
    font-size: 0.9rem;
    color: var(--bs-gray-600);
}

.file-upload-hint {
    font-size: 0.8rem;
    color: var(--bs-gray-500);
    margin-top: 0.25rem;
}

.file-name {
    display: inline-block;
    margin-top: 0.75rem;
    padding: 0.375rem 0.75rem;
    background: var(--bs-gray-200);
    border-radius: var(--bs-border-radius);
    font-size: 0.85rem;
    color: var(--bs-gray-700);
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== Steps ===== */
.steps {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.step {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8rem;
    color: var(--bs-gray-500);
}

.step.active {
    color: #1a6b2a;
    font-weight: 600;
}

.step.done {
    color: var(--bs-success);
}

.step-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bs-gray-300);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}

.step.active .step-num {
    background: var(--bs-primary);
    color: #000;
}

.step.done .step-num {
    background: var(--bs-success);
}

.step-divider {
    width: 30px;
    height: 2px;
    background: var(--bs-gray-300);
    align-self: center;
}

/* ===== Cooldown Timer ===== */
.countdown {
    font-size: 0.85rem;
    color: var(--bs-gray-600);
    text-align: center;
}

.countdown strong {
    color: var(--bs-danger);
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 1.5rem 1rem;
    font-size: 0.8rem;
    color: var(--bs-gray-600);
    border-top: 1px solid var(--bs-gray-200);
    margin-top: 2rem;
}

.footer a {
    color: var(--bs-gray-600);
}

.footer a:hover {
    color: var(--bs-gray-700);
}

/* ===== Loading Spinner ===== */
.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(0,0,0,.3);
    border-top-color: #000;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ===== Username display ===== */
.username-display {
    text-align: center;
    padding: 1rem;
    margin-bottom: 1rem;
    background: var(--bs-gray-100);
    border-radius: var(--bs-border-radius);
    border: 1px solid var(--bs-gray-200);
}

.username-display .avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    margin-bottom: 0.5rem;
}

.username-display .name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--bs-gray-900);
}

.username-display .email {
    font-size: 0.85rem;
    color: var(--bs-gray-600);
}

/* ===== Responsive ===== */
@media (max-width: 576px) {
    .container {
        margin: 1rem auto;
        padding: 0 0.75rem;
    }
    .code-input {
        width: 40px;
        height: 48px;
        font-size: 1.25rem;
    }
    .card-body {
        padding: 1rem;
    }
}