/* ===== CSS VARIABLES ===== */
:root {
    --primary-color: #3bd4b8;
    --secondary-color: #1e3a5f;
    --accent-color: #54d2c5;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-bg: #f8f9fa;
    --dark-bg: #212529;
    --white: #ffffff;
    --text-dark: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --border-color: #e0e0e0;
    --card-shadow: 0 8px 25px rgba(0,0,0,0.1);
    --card-hover-shadow: 0 12px 35px rgba(0,0,0,0.15);
    --border-radius: 12px;
    --border-radius-sm: 6px;
    --border-radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ===== HEADER STYLES ===== */
.main-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: none;
    box-shadow: var(--card-shadow);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.back-button .back-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--border-radius-sm);
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.back-button .back-link:hover {
    transform: scale(1.05);
    color: var(--white);
    text-decoration: none;
}

.header-title h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
}

.menu-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--primary-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.menu-toggle:hover {
    background: var(--light-bg);
}

/* ===== NAVBAR STYLES ===== */
.main-navbar {
    background: var(--white);
    box-shadow: var(--card-shadow);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 999;
    transform: translateY(-100%);
    transition: var(--transition);
}

.main-navbar.show {
    transform: translateY(0);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 0;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
}

.brand-text {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-color);
}

.navbar-nav {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-dark);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    background: var(--light-bg);
    color: var(--primary-color);
    text-decoration: none;
}

.nav-link i {
    width: 20px;
    text-align: center;
}

/* ===== MAIN CONTENT STYLES ===== */
.main-content {
    margin-top: 5rem;
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

.content-wrapper {
    background: var(--white);
    border-radius: 4px;
    box-shadow: var(--card-shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

/* ===== FORM STYLES ===== */
.form-section {
    margin-bottom: 2rem;
}

.banner {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-icon {
    color: var(--accent-color);
}

.selection {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    background: var(--white);
    transition: var(--transition);
    margin-bottom: 1rem;
}

.selection:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.selection option {
    padding: 0.5rem;
}

.hidden {
    color: var(--text-muted);
}

.worning {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: -0.5rem;
    margin-bottom: 1rem;
}

/* ===== BUTTON STYLES ===== */
.qbtn {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    border: none;
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    width: 100%;
    margin: 1.5rem 0;
}

.qbtn:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-hover-shadow);
}

.qbtn:active {
    transform: translateY(0);
}

/* ===== RESULTS AREA STYLES ===== */
.area {
    background: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
    border: 2px solid var(--border-color);
}

.area h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* ===== TABLE STYLES ===== */
.table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.table th,
.table td {
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--primary-color);
    color: var(--white);
    font-weight: 600;
}

.table tr:hover {
    background: var(--light-bg);
}

.percentile-50 td {
    background: rgba(40, 167, 69, 0.1);
}

.percentile-90 td {
    background: rgba(255, 193, 7, 0.1);
}

.percentile-95 td {
    background: rgba(220, 53, 69, 0.1);
}

.green {
    color: var(--success-color);
    font-weight: 600;
}

.orange {
    color: var(--warning-color);
    font-weight: 600;
}

.red {
    color: var(--danger-color);
    font-weight: 600;
}

/* ===== CARD STYLES ===== */
.calc-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: none;
    overflow: hidden;
    margin-bottom: 1.5rem;
    text-decoration: none;
    color: inherit;
}

.calc-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-hover-shadow);
    text-decoration: none;
    color: inherit;
}

.calc-card-body {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: rgba(0, 0, 0, 0.1) 0px 1px 2px 0px;
}

.calc-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
    flex-shrink: 0;
}

.calc-icon.bp { background: linear-gradient(135deg, #e74c3c, #c0392b); }
.calc-icon.bmi { background: linear-gradient(135deg, #3498db, #2980b9); }
.calc-icon.weight { background: linear-gradient(135deg, #9b59b6, #8e44ad); }
.calc-icon.qtc { background: linear-gradient(135deg, #1abc9c, #16a085); }
.calc-icon.emergency { background: linear-gradient(135deg, #e67e22, #d35400); }
.calc-icon.gcs { background: linear-gradient(135deg, #f39c12, #e67e22); }
.calc-icon.fluid { background: linear-gradient(135deg, #3498db, #2980b9); }
.calc-icon.more { background: linear-gradient(135deg, #95a5a6, #7f8c8d); }

.calc-content h5 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 600;
}

.calc-content p {
    color: var(--text-light);
    margin-bottom: 0;
}

/* ===== SPECIAL COMPONENT STYLES ===== */

/* GCS Specific Styles */
.top {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top:hover {
    border-color: var(--accent-color);
}

.value {
    background: var(--light-bg);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    color: var(--primary-color);
    font-weight: 600;
}

.page {
    display: none;
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
    margin-top: -1rem;
    margin-bottom: 1rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.control-group label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--white);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.control-group label:hover {
    background: var(--accent-color);
    color: var(--white);
}

.control-group input[type="radio"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-color);
}

.gcsarea {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    margin: 2rem 0;
}

.gcsarea h3 {
    margin: 0;
    display: inline;
}

/* WETFLAG Specific Styles */
.input {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    box-shadow: var(--card-shadow);
}

.unit {
    display: flex;
    align-items: center;
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    margin-bottom: 1rem;
    gap: 1rem;
}

.label {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.intro {
    flex: 1;
    color: var(--text-dark);
    font-weight: 600;
}

.display {
    background: var(--light-bg);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    color: var(--primary-color);
    font-weight: 700;
    min-width: 100px;
    text-align: center;
}

/* BMI/About Specific Styles */
.bar1 {
    display: flex;
    align-items: center;
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--card-shadow);
    gap: 1rem;
}

.bar-img1 {
    flex-shrink: 0;
}

.bar-img1 img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-color);
}
.bar-imgx img{
    width: 38px;
}

.bar-data1 h4 {
    margin-bottom: 0.25rem;
    color: var(--primary-color);
}

.bar-data1 p {
    margin: 0;
    color: var(--text-light);
}

/* ===== FOOTER STYLES ===== */
.main-footer {
    background: var(--white);
    margin-top: auto;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 2rem 0;
    gap: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-description {
    color: var(--text-light);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-dark);
    text-decoration: none;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    box-shadow: rgba(50, 50, 93, 0.25) 0px 2px 5px -1px, rgba(0, 0, 0, 0.3) 0px 1px 3px -1px;
}

.footer-link:hover {
    background: var(--light-bg);
    color: var(--primary-color);
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 0;
    text-align: center;
}

.disclaimer {
    background: rgba(255, 193, 7, 0.1);
    border-left: 4px solid var(--warning-color);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1rem;
}

.disclaimer p {
    margin: 0;
    color: var(--text-dark);
    font-size: 0.875rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.disclaimer i {
    color: var(--warning-color);
    margin-top: 0.1rem;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ===== WARNING BANNER ===== */
.warning-banner {
    background: rgba(255, 193, 7, 0.1);
    border: 2px solid var(--warning-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.warning-icon {
    color: var(--warning-color);
    font-size: 1.5rem;
    margin-top: 0.1rem;
}

.warning-text {
    margin: 0;
    color: var(--text-dark);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .main-content {
        margin-top: 4rem;
        padding: 1rem 0;
    }
    
    .content-wrapper {
        padding: 1.5rem;
    }
    
    .header-title h1 {
        font-size: 1.25rem;
    }
    
    .calc-card-body {
        padding: 1rem;
    }
    
    .calc-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .unit {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }
    
    .bar1 {
        flex-direction: column;
        text-align: center;
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem;
    }
}

@media (max-width: 576px) {
    .qbtn {
        padding: 1rem;
        font-size: 0.875rem;
    }
    
    .banner {
        font-size: 0.875rem;
    }
    
    .disclaimer p {
        flex-direction: column;
        gap: 0.25rem;
    }
}

/* ===== UTILITY CLASSES ===== */
.fade-in {
    animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.hidden {
    display: none;
}

.show {
    display: block;
}

/* ===== ACCESSIBILITY ===== */
.calc-card:focus {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

.qbtn:focus {
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.3);
}

.nav-link:focus,
.footer-link:focus,
.back-link:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
    .main-header,
    .main-navbar,
    .main-footer {
        display: none;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    body {
        background: white;
    }
    
    .content-wrapper {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}



/* ===== SPECIAL COMPONENT STYLES ===== */

/* Fluid Results Specific Styles */
.fluid-result {
    text-align: center;
    padding: 2rem;
}

.result-header {
    margin-bottom: 1.5rem;
}

.result-header h4 {
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0;
}

.result-display {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
}

.result-value {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.result-number {
    font-size: 3rem;
    font-weight: 700;
}

.result-unit {
    font-size: 1.5rem;
    font-weight: 600;
}

.result-formula {
    opacity: 0.9;
}

.result-info {
    margin-top: 1rem;
    color: var(--text-light);
}

/* WETFLAG Specific Styles */
.wetflag-results {
    margin-top: 2rem;
}

.unit-special {
    display: flex;
    align-items: center;
    background: var(--light-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    margin-bottom: 1rem;
    gap: 1rem;
    justify-content: space-between;
}

.form-help {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-top: -0.5rem;
    margin-bottom: 1rem;
    display: block;
}

/* GCS Specific Styles */
.gcs-section {
    margin-bottom: 1.5rem;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
}

.gcs-total {
    text-align: center;
    padding: 2rem;
}

.gcs-total h3 {
    color: var(--white);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.score-display {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.score-display #total {
    font-size: 4rem;
    font-weight: 700;
    color: var(--white);
}

.score-max {
    font-size: 2rem;
    color: var(--white);
    opacity: 0.8;
}

.score-interpretation {
    margin-top: 1rem;
}

.score-interpretation p {
    margin: 0;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
}

.score-mild {
    background: rgba(40, 167, 69, 0.2);
    color: var(--success-color);
    border: 2px solid var(--success-color);
}

.score-moderate {
    background: rgba(255, 193, 7, 0.2);
    color: var(--warning-color);
    border: 2px solid var(--warning-color);
}

.score-severe {
    background: rgba(220, 53, 69, 0.2);
    color: var(--danger-color);
    border: 2px solid var(--danger-color);
}

/* Error Page Specific Styles */
.error-container {
    padding: 3rem 1rem;
    max-width: 600px;
    margin: 0 auto;
}

.error-icon {
    font-size: 5rem;
    color: var(--warning-color);
    margin-bottom: 2rem;
}

.error-content h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.error-message {
    font-size: 1.125rem;
    color: var(--text-dark);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.error-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.retry-btn,
.home-btn {
    min-width: 150px;
    margin: 0;
}

.home-btn {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

.offline-info {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 2px solid var(--border-color);
}

.offline-info p {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    font-size: 1.125rem;
}

.offline-tools {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.tool-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--white);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
    border: 2px solid var(--border-color);
}

.tool-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
    color: var(--primary-color);
    text-decoration: none;
    border-color: var(--accent-color);
}

.tool-link i {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.tool-link span {
    font-size: 0.875rem;
    font-weight: 600;
    text-align: center;
}

.main-navbar {
    display: none; /* Hidden by default */
}

.main-navbar.show {
    display: block; /* Shown when .show class is added */
}