/* ============================================
   bixl.io — Shared Design System
   ============================================ */

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

/* ── Design Tokens ── */
:root {
    --bg:            #F8FAFC;
    --bg-card:       #FFFFFF;
    --bg-card-hover: #F1F5F9;
    --text:          #1E293B;
    --text-muted:    #64748B;
    --text-dim:      #94A3B8;
    --accent-primary: #0369A1;
    --accent-teal:    #0D9488;
    --accent-blue:    #0284C7;
    --border:        #E2E8F0;
    --border-light:  #F1F5F9;

    /* App brand colors */
    --envelup-green: #16A34A;
    --merea-orange:  #E8762D;

    --font-primary:  'Poppins', system-ui, -apple-system, sans-serif;
    --radius:        12px;
    --radius-sm:     8px;
    --transition:    0.3s ease;
}

/* ── Reset & Base ── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-teal);
}

/* ── Layout ── */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* ── Navigation Bar ── */
.navbar {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 1.15rem;
    letter-spacing: 0.5px;
}

.navbar-brand img {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.navbar-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.navbar-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition);
    position: relative;
}

.navbar-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition);
    border-radius: 1px;
}

.navbar-links a:hover {
    color: var(--text);
}

.navbar-links a:hover::after {
    width: 100%;
}

/* ── Page Header ── */
.page-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.page-header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.6rem;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    border: 1.5px solid var(--accent-primary);
    background: transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn:hover {
    background: rgba(3, 105, 161, 0.06);
    border-color: var(--accent-teal);
    box-shadow: 0 4px 16px rgba(3, 105, 161, 0.12);
    transform: translateY(-2px);
    color: var(--text);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-blue));
    border-color: transparent;
    color: #FFFFFF;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-primary));
    border-color: transparent;
    box-shadow: 0 4px 24px rgba(3, 105, 161, 0.25);
}

/* ── Cards ── */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 2rem;
    transition: all var(--transition);
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

/* ── Footer ── */
.footer {
    margin-top: 4rem;
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.85rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
    list-style: none;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-links a:hover {
    color: var(--accent-teal);
}

/* ── Form Elements ── */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
}

.form-group label {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.form-group input,
.form-group textarea {
    padding: 0.8rem 1rem;
    background: var(--bg);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    transition: all var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-card);
    box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.1);
}

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

/* ── Section Titles ── */
.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-teal);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
}

.section-heading {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 1rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

/* ── Tech Tags ── */
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--border-light);
    border: 1px solid var(--border);
    border-radius: 20px;
    letter-spacing: 0.3px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }

    .navbar-links {
        gap: 1.25rem;
    }

    .navbar-links a {
        font-size: 0.85rem;
    }

    .container {
        padding: 1.5rem 1rem;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

    .footer-links {
        gap: 1.25rem;
    }
}

@media (max-width: 480px) {
    .navbar {
        flex-direction: column;
        gap: 0.75rem;
    }

    .navbar-links {
        gap: 1rem;
    }
}