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

:root {
    --primary: #2563EB;
    --primary-dark: #1E40AF;
    --primary-light: #EFF6FF;
    --primary-border: #BFDBFE;
    --success: #22C55E;
    --success-bg: #DCFCE7;
    --danger: #EF4444;
    --danger-bg: #FEE2E2;
    --warning: #F59E0B;
    --bg-body: #F8FAFC;
    --card-bg: #FFFFFF;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* NAVBAR */
.navbar {
    background: linear-gradient(135deg, #1E40AF 0%, #2563EB 100%);
    color: #FFFFFF;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #FFFFFF;
    font-weight: 700;
    font-size: 1.4rem;
}

.navbar-brand span.shield-icon {
    font-size: 1.6rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    list-style: none;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: #FFFFFF;
    background: rgba(255, 255, 255, 0.15);
}

/* MAIN CONTAINER */
.main-content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* HERO SECTION */
.hero-section {
    background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);

}

.hero-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 1.5rem auto;
}

.btn-hero {
    display: inline-block;
    background: var(--primary);
    color: #FFFFFF;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-hero:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

/* CARDS */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid #F3F4F6;
    padding-bottom: 0.75rem;
}

.card-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* FORM ELEMENTS */
.form-group {
    margin-bottom: 1rem;
    position: relative;
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.email-textarea {
    width: 100%;
    height: 180px;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--text-primary);
    resize: vertical;
    outline: none;
    transition: var(--transition);
}

.email-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.char-counter {
    text-align: right;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.3rem;
}

.button-group {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-top: 1.2rem;
}

.btn {
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: #FFFFFF;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: #E5E7EB;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: #D1D5DB;
}

.sample-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 1rem;
}

.btn-sample {
    background: #F3F4F6;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-sample:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    border-color: var(--primary-border);
}

/* RESULT CARD */
.result-card {
    display: none;
    border-left: 6px solid var(--primary);
    animation: fadeIn 0.4s ease-out forwards;
}

.result-card.spam {
    border-left-color: var(--danger);
    background: linear-gradient(to right, #FFF5F5, #FFFFFF);
}

.result-card.ham {
    border-left-color: var(--success);
    background: linear-gradient(to right, #F0FDF4, #FFFFFF);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-spam {
    background: var(--danger-bg);
    color: var(--danger);
}

.badge-ham {
    background: var(--success-bg);
    color: var(--success);
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.2rem;
}

.metric-box {
    background: #F9FAFB;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.2rem;
    text-align: center;
}

.metric-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-top: 0.2rem;
}

.metric-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* PROBABILITY BARS */
.prob-container {
    margin-top: 1.2rem;
}

.prob-item {
    margin-bottom: 0.8rem;
}

.prob-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.3rem;
}

.prob-bar-bg {
    height: 12px;
    background: #E5E7EB;
    border-radius: 6px;
    overflow: hidden;
}

.prob-bar-fill {
    height: 100%;
    border-radius: 6px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.prob-bar-fill.spam {
    background: var(--danger);
}

.prob-bar-fill.ham {
    background: var(--success);
}

/* METRICS DASHBOARD GRID */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 54px;
    height: 54px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    background: var(--primary-light);
    color: var(--primary);
}

.stat-info h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* HISTORY TABLE */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.history-table th,
.history-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.history-table th {
    background: #F9FAFB;
    font-weight: 600;
    color: var(--text-secondary);
}

.history-table tr:hover {
    background: #F3F4F6;
}

/* FOOTER */
.footer {
    background: #1E293B;
    color: #94A3B8;
    text-align: center;
    padding: 2rem 1rem;
    margin-top: auto;
    font-size: 0.9rem;
}

.footer a {
    color: #38BDF8;
    text-decoration: none;
}

/* ANIMATIONS */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
    .navbar {
        padding: 0 1rem;
        height: auto;
        flex-direction: column;
        padding-bottom: 10px;
    }
    
    .nav-links {
        margin-top: 10px;
        gap: 0.5rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .card {
        padding: 1.25rem;
    }

    .button-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}