/* Modern MID Code Generator - Enhanced UI */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-gradient: linear-gradient(135deg, #1f6f6d 0%, #315f72 100%);
    --secondary-gradient: linear-gradient(135deg, #b45309 0%, #d97706 100%);
    --success-gradient: linear-gradient(135deg, #16865a 0%, #0f766e 100%);
    --warning-gradient: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
    --dark-gradient: linear-gradient(135deg, #21333b 0%, #315f72 100%);

    --primary-color: #1f6f6d;
    --primary-hover: #195d5b;
    --secondary-color: #b45309;
    --success-color: #16865a;
    --warning-color: #d97706;
    --danger-color: #b42318;
    --info-color: #315f72;

    --text-primary: #22313a;
    --text-secondary: #667784;
    --text-light: #9aa8b3;

    --bg-primary: #f3f6f7;
    --bg-secondary: #e8eef1;
    --bg-white: #ffffff;

    --border-color: #d9e2e7;
    --surface-muted: #f7f9fa;
    --border-radius-sm: 6px;
    --border-radius: 8px;
    --border-radius-lg: 8px;
    --border-radius-xl: 8px;

    --shadow-sm: 0 1px 2px rgba(26, 43, 51, 0.06);
    --shadow: 0 4px 10px rgba(26, 43, 51, 0.08);
    --shadow-lg: 0 12px 24px rgba(26, 43, 51, 0.10);
    --shadow-xl: 0 18px 36px rgba(26, 43, 51, 0.14);

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

/* Page background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(180deg, #eef3f5 0%, rgba(238, 243, 245, 0) 320px),
        repeating-linear-gradient(90deg, rgba(31, 111, 109, 0.035) 0, rgba(31, 111, 109, 0.035) 1px, transparent 1px, transparent 96px);
    z-index: -1;
    pointer-events: none;
}

.container-fluid {
    max-width: 1500px;
    margin: 0 auto;
    padding: 0 32px;
}

/* App header */
header {
    background: #ffffff;
    color: var(--text-primary);
    padding: 1.35rem 1.75rem;
    border: 1px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: visible;
    margin-bottom: 1.5rem;
}

header::before {
    content: none;
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.08), transparent);
    animation: headerShine 4s ease-in-out infinite;
}

@keyframes headerShine {
    0%, 100% { transform: none; }
    50% { transform: none; }
}

header h1 {
    font-weight: 650;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    text-shadow: none;
    letter-spacing: 0;
    position: relative;
    line-height: 1.25;
    overflow-wrap: anywhere;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    max-width: 100%;
}

.header-title-text {
    display: block;
    min-width: 0;
    overflow-wrap: anywhere;
    word-break: break-all;
    white-space: normal;
}

header .lead {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0;
}

/* Modern Navigation Tabs */
.nav-tabs {
    border: none;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 6px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.75rem;
    backdrop-filter: none;
}

.nav-tabs .nav-link {
    border: none;
    color: var(--text-secondary);
    font-weight: 600;
    padding: 0.85rem 1.25rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    margin: 0 2px;
    font-size: 0.98rem;
}

.nav-tabs .nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    transition: var(--transition);
    z-index: -1;
}

.nav-tabs .nav-link:hover {
    color: var(--primary-color);
    background: #eef7f6;
    transform: none;
}

.nav-tabs .nav-link.active {
    color: white;
    background: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transform: none;
}

.nav-tabs .nav-link.active::before {
    left: 0;
}

/* Enhanced Cards - Larger and More Prominent */
.card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
    backdrop-filter: none;
    position: relative;
    min-height: auto;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
    background: none;
}

.card:hover {
    transform: none;
    box-shadow: var(--shadow);
}

.card-header {
    background: var(--surface-muted);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    position: relative;
}

.card-header h5 {
    margin: 0;
    font-size: 1.12rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-body {
    padding: 1.75rem;
}

/* Modern Form Controls */
.form-label {
    font-weight: 650;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 0.98rem;
    letter-spacing: 0;
}

.form-control {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.9rem 1rem;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--bg-white);
    color: var(--text-primary);
    min-height: 48px;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(31, 111, 109, 0.12);
    background: var(--bg-white);
    color: var(--text-primary);
}

.form-control::placeholder {
    color: var(--text-light);
}

.form-control-lg {
    padding: 1.25rem 1.5rem;
    font-size: 1.2rem;
    min-height: 58px;
}

/* Textarea Specific */
textarea.form-control {
    min-height: 180px;
    resize: vertical;
    line-height: 1.6;
}

/* Enhanced Buttons - Larger */
.btn {
    font-weight: 600;
    padding: 0.85rem 1.5rem;
    border-radius: var(--border-radius);
    border: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    font-size: 1rem;
    letter-spacing: 0;
    text-transform: none;
    min-height: 48px;
}

.btn-lg {
    padding: 0.95rem 1.75rem;
    font-size: 1.02rem;
    min-height: 52px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transition: width 0.6s, height 0.6s, top 0.6s, left 0.6s;
    transform: translate(-50%, -50%);
}

.btn:active::before {
    width: 300px;
    height: 300px;
    top: 50%;
    left: 50%;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: none;
    box-shadow: var(--shadow);
    color: white;
}

.btn-outline-primary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: #eef7f6;
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: none;
    box-shadow: none;
}

.btn-success {
    background: var(--success-gradient);
    color: white;
    box-shadow: var(--shadow);
}

.btn-success:hover {
    background: var(--success-gradient);
    transform: none;
    box-shadow: var(--shadow);
    color: white;
}

/* Button Groups */
.btn-group .btn-check:checked + .btn {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* MID Code Display - More Prominent */
.mid-code-display {
    background: #243942;
    border: 1px solid #172a31;
    border-radius: var(--border-radius);
    padding: 2.25rem 1.5rem;
    margin: 1.5rem 0;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mid-code-display::before {
    content: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg,
        rgba(255,255,255,0.1) 25%,
        transparent 25%,
        transparent 75%,
        rgba(255,255,255,0.1) 75%);
    background-size: 20px 20px;
    animation: move 20s linear infinite;
}

@keyframes move {
    0% { background-position: 0 0; }
    100% { background-position: 20px 20px; }
}

#midCodeDisplay {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;
    color: white;
    letter-spacing: 6px;
    font-weight: 800;
    font-size: 2.8rem;
    text-shadow: none;
    position: relative;
    z-index: 1;
    text-align: center;
}

/* Parse Results Enhancement */
.parse-item {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.parse-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-gradient);
}

.parse-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
    transform: none;
}

.parse-item .badge {
    font-size: 0.8rem;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* Validation Status Enhancement */
.validation-status {
    padding: 1.5rem;
    border-radius: var(--border-radius-lg);
    margin-top: 1.5rem;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.validation-status::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.validation-status.valid {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.1) 0%, rgba(0, 242, 254, 0.1) 100%);
    border: 1px solid rgba(79, 172, 254, 0.3);
    color: var(--info-color);
}

.validation-status.valid::before {
    background: var(--success-gradient);
}

.validation-status.invalid {
    background: linear-gradient(135deg, rgba(245, 87, 108, 0.1) 0%, rgba(250, 112, 154, 0.1) 100%);
    border: 1px solid rgba(245, 87, 108, 0.3);
    color: var(--danger-color);
}

.validation-status.invalid::before {
    background: var(--secondary-gradient);
}

.validation-status.warning {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1) 0%, rgba(254, 225, 64, 0.1) 100%);
    border: 1px solid rgba(255, 193, 7, 0.3);
    color: #d69e2e;
}

.validation-status.warning::before {
    background: var(--warning-gradient);
}

/* Breakdown Display Enhancement */
.breakdown-item {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius);
    padding: 1.25rem;
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.breakdown-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-gradient);
    transform: scaleY(0);
    transition: var(--transition);
}

.breakdown-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.breakdown-item:hover::before {
    transform: scaleY(1);
}

.breakdown-item .part-name {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.breakdown-item .part-value {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-weight: 800;
    color: var(--primary-color);
    font-size: 1.3rem;
    letter-spacing: 1px;
}

.breakdown-item .part-source {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    font-weight: 500;
}

/* Alert Enhancement */
.alert {
    border: none;
    border-radius: var(--border-radius-lg);
    padding: 1.25rem 1.5rem;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.alert-success {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.1) 0%, rgba(0, 242, 254, 0.1) 100%);
    color: var(--info-color);
    border: 1px solid rgba(79, 172, 254, 0.2);
}

.alert-success::before {
    background: var(--success-gradient);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(245, 87, 108, 0.1) 0%, rgba(250, 112, 154, 0.1) 100%);
    color: var(--danger-color);
    border: 1px solid rgba(245, 87, 108, 0.2);
}

.alert-danger::before {
    background: var(--secondary-gradient);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1) 0%, rgba(254, 225, 64, 0.1) 100%);
    color: #d69e2e;
    border: 1px solid rgba(255, 193, 7, 0.2);
}

.alert-warning::before {
    background: var(--warning-gradient);
}

/* Footer */
.app-footer {
    background: rgba(255, 255, 255, 0.92);
    color: var(--text-secondary) !important;
    margin: 1.5rem auto 0;
    border-top: 1px solid var(--border-color);
    border-radius: 0;
    box-shadow: none;
    position: relative;
    overflow: visible;
    padding: 0.75rem 0;
    max-width: 1500px;
}

.app-footer::before {
    content: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: none;
}

.app-footer p {
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.35;
    margin: 0;
}

.footer-copyright {
    display: block;
}

.app-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
}

.app-footer a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.25rem 0.45rem;
    margin-top: 0.4rem;
    color: var(--text-light);
    font-size: 0.82rem;
    line-height: 1.35;
}

.footer-links span {
    color: var(--text-light);
}

/* Loading Animation Enhancement */
.spinner {
    width: 1.5rem;
    height: 1.5rem;
    border: 3px solid rgba(102, 126, 234, 0.2);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.1); }
    100% { transform: rotate(360deg) scale(1); }
}

/* Enhanced Icons */
.fas, .fab {
    background: none;
    -webkit-background-clip: initial;
    -webkit-text-fill-color: currentColor;
    background-clip: initial;
    color: var(--primary-color);
}

.btn-primary .fas,
.nav-tabs .nav-link.active .fas,
.btn-check:checked + .btn .fas {
    color: currentColor;
}

/* Responsive Design Enhancement */
@media (max-width: 768px) {
    .container-fluid {
        padding: 0 14px;
    }

    header {
        padding: 1rem 1.1rem;
        margin-bottom: 1.25rem;
    }

    header h1 {
        font-size: 1.28rem;
        max-width: 100%;
        width: 100%;
        display: flex;
    }

    header h1 .fas {
        font-size: 1.1em;
        margin-right: 0.35rem !important;
    }

    .header-title-text {
        max-width: calc(100vw - 6rem);
    }

    .nav-tabs .nav-link {
        padding: 0.75rem 0.5rem;
        font-size: 0.86rem;
    }

    .card-header {
        padding: 1rem 1.1rem;
    }

    .card-body {
        padding: 1.1rem;
    }

    .mid-code-display {
        padding: 1.5rem;
    }

    #midCodeDisplay {
        font-size: 1.8rem;
        letter-spacing: 2px;
    }

    .breakdown-item {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }

    .breakdown-item .part-source {
        margin-top: 0.5rem;
    }
}

@media (max-width: 576px) {
    header h1 {
        font-size: 1.08rem;
        flex-direction: column;
        gap: 0.35rem;
    }

    header .lead {
        font-size: 0.82rem;
    }

    header h1 .fas {
        margin-right: 0 !important;
    }

    .header-title-text {
        max-width: 100%;
    }

    .btn-group {
        flex-direction: column;
        gap: 0.5rem;
    }

    .btn-group .btn {
        border-radius: var(--border-radius) !important;
    }

    .nav-tabs {
        padding: 4px;
        flex-direction: column;
    }

    .nav-tabs .nav-link {
        padding: 0.7rem 0.75rem;
        margin: 2px 0;
    }

    #midCodeDisplay {
        font-size: 1.4rem;
        letter-spacing: 1px;
    }
}

/* Smooth Animations */
* {
    transition: var(--transition-fast);
}

.card, .btn, .form-control, .nav-link {
    transition: var(--transition);
}

/* Focus States */
.btn:focus,
.form-control:focus,
.nav-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(31, 111, 109, 0.12);
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

::-webkit-scrollbar-thumb {
    background: #8fb8b5;
    border-radius: var(--border-radius);
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dark-gradient);
}

/* Glassmorphism Effect */
.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Pulse Animation for Important Elements */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* Floating Animation */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.float {
    animation: float 3s ease-in-out infinite;
}

/* Row Spacing */
.row.g-4 {
    --bs-gutter-x: 2rem;
    --bs-gutter-y: 2rem;
}

/* History Section - More Compact */
.mt-5 {
    margin-top: 4rem !important;
}

/* 生成页面卡片上下结构优化 */
#generate .card {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
}
#generate .card.mb-4 {
    margin-bottom: 1.5rem !important;
}
#generate .card + .card {
    margin-top: 0 !important;
}

/* 保持tab与卡片间距 */
#mainTabs {
    margin-bottom: 1.75rem !important;
}

/* 其他tab页面不变 */

/* 所有tab主卡片宽度对齐tab导航 */
.tab-pane .card {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
}

/* 保证tab导航与卡片左右对齐 */
.row.justify-content-center > [class^='col-'] {
    padding-left: 0 !important;
    padding-right: 0 !important;
}