/* Nguyet Vu - Unique Sage-Neon Card Dashboard Style */
:root {
    --bg: #0F1A15;
    --card-bg: #16251F;
    --accent-sage: #4ADE80;
    --accent-sand: #F5E8C7;
    --accent-lavender: #C4B5FD;
    --text-primary: #E8F5E9;
    --text-secondary: #A3B8A8;
    --border: rgba(74, 222, 128, 0.15);
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.75;
}

/* Classic Header with Modern Twist */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 26, 21, 0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 22px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -1px;
    color: var(--accent-sage);
}

.nav-links {
    display: flex;
    gap: 36px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent-sage);
}

/* Centered Minimalist Hero */
.hero {
    text-align: center;
    padding: 140px 40px 100px;
    max-width: 780px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 62px;
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -3px;
    margin-bottom: 28px;
}

.hero p {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 48px;
}

/* Sage-Neon Buttons */
.sage-button {
    background: transparent;
    border: 2px solid var(--accent-sage);
    color: var(--accent-sage);
    padding: 16px 36px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-radius: 9999px;
    transition: all 0.3s ease;
    box-shadow: 0 0 12px rgba(74, 222, 128, 0.3);
    text-decoration: none;
    display: inline-block;
}

.sage-button:hover {
    background: var(--accent-sage);
    color: #0F1A15;
    box-shadow: 0 0 25px var(--accent-sage);
    transform: translateY(-3px);
}

/* Card-Based Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 40px;
}

.dashboard-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 36px 32px;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
    cursor: pointer;
}

.dashboard-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    border-color: var(--accent-sage);
}

.dashboard-card .tag {
    font-size: 11px;
    letter-spacing: 2.5px;
    color: var(--accent-lavender);
    margin-bottom: 14px;
    font-weight: 700;
}

.dashboard-card h3 {
    font-size: 21px;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 16px;
}

.dashboard-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 22px;
}

.read-more {
    color: var(--accent-sage);
    font-weight: 600;
    font-size: 14px;
}

/* Form Card */
.form-card {
    max-width: 580px;
    margin: 80px auto;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 52px 44px;
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.25);
}

.form-input {
    width: 100%;
    background: #0F1A15;
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 17px 22px;
    font-size: 15px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.form-input:focus {
    border-color: var(--accent-sage);
    box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.1);
    outline: none;
}

textarea.form-input {
    min-height: 140px;
    resize: vertical;
}

/* Footer */
footer {
    background: #08100C;
    padding: 70px 40px 50px;
    border-top: 1px solid var(--border);
}

.footer-grid {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.7fr 1fr 1fr;
    gap: 60px;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 26, 21, 0.96);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active { display: flex; }

.modal-content {
    max-width: 780px;
    width: 100%;
    background: var(--card-bg);
    border: 1px solid var(--accent-sage);
    border-radius: 20px;
    padding: 50px;
    position: relative;
    max-height: 85vh;
    overflow-y: auto;
}

.modal-close {
    position: absolute;
    top: 24px;
    right: 28px;
    font-size: 32px;
    color: var(--text-secondary);
    cursor: pointer;
}

.modal-close:hover { color: var(--accent-sage); }

/* Responsive */
@media (max-width: 900px) {
    .nav-links {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}