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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f8fafc;
    color: #1e293b;
    line-height: 1.7;
    font-size: 16px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* ===== UTILITIES ===== */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background-color: #2563eb;
    color: #fff;
}

.btn-primary:hover {
    background-color: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background-color: #fff;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-secondary:hover {
    background-color: #2563eb;
    color: #fff;
    transform: translateY(-2px);
}

.btn-copy {
    background-color: #10b981;
    color: #fff;
    padding: 8px 20px;
    font-size: 0.9rem;
}

.btn-copy:hover {
    background-color: #059669;
    transform: translateY(-1px);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    color: #1e293b;
}

.section-desc {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 40px;
    color: #475569;
    font-size: 1.05rem;
}

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    z-index: 1000;
    padding: 16px 0;
}

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

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: #2563eb;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-menu a {
    color: #475569;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #2563eb;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 3px;
    background-color: #1e293b;
    border-radius: 2px;
    transition: all 0.3s;
}

/* ===== HERO ===== */
.hero {
    padding: 140px 0 80px;
    text-align: center;
    background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 100%);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: #475569;
    max-width: 700px;
    margin: 0 auto 32px;
}

/* ===== QUOTE SECTION ===== */
.quote-section {
    padding: 60px 0;
    background-color: #fff;
}

.quote-card {
    background: linear-gradient(135deg, #fef3c7 0%, #fef9c3 100%);
    border-left: 5px solid #f59e0b;
    border-radius: 12px;
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.1);
}

.quote-text {
    font-size: 1.15rem;
    font-style: italic;
    color: #92400e;
    line-height: 1.8;
}

.quote-follow {
    text-align: center;
    font-size: 1.05rem;
    color: #475569;
    margin-bottom: 12px;
}

.quote-transparency {
    text-align: center;
    font-size: 1rem;
    color: #10b981;
    font-weight: 500;
}

/* ===== NOTE SECTION ===== */
.note-section {
    padding: 40px 0;
}

.note-card {
    background-color: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 28px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.note-text {
    color: #475569;
    margin-bottom: 16px;
    font-size: 1rem;
}

.note-humor {
    color: #6b7280;
    font-style: italic;
    font-size: 0.95rem;
}

/* ===== DONATION SECTION ===== */
.donation-section {
    padding: 80px 0;
    background-color: #fff;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background-color: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.card-wide {
    grid-column: 1 / -1;
    max-width: 400px;
    margin: 0 auto;
    width: 100%;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.card-icon {
    font-size: 2rem;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #1e293b;
}

.card-body {
    margin-bottom: 16px;
}

.card-label {
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1e293b;
    font-family: 'Courier New', monospace;
    margin-bottom: 8px;
}

.card-footer {
    display: flex;
    align-items: center;
    gap: 12px;
}

.copy-feedback {
    font-size: 0.85rem;
    color: #10b981;
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.3s;
}

.copy-feedback.show {
    opacity: 1;
}

/* ===== TRANSPARENCY SECTION ===== */
.transparency-section {
    padding: 80px 0;
    background-color: #f8fafc;
}

.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.usage-card {
    background-color: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s;
}

.usage-card:hover {
    transform: translateY(-2px);
}

.usage-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 12px;
}

.usage-card p {
    color: #475569;
    font-weight: 500;
}

/* ===== WHY SECTION ===== */
.why-section {
    padding: 80px 0;
    background-color: #fff;
}

/* ===== CONTACT SECTION ===== */
.contact-section {
    padding: 80px 0;
    background-color: #f8fafc;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 500px;
    margin: 0 auto 40px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background-color: #fff;
    padding: 20px;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.contact-icon {
    font-size: 1.5rem;
}

.contact-label {
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 2px;
}

.contact-value {
    color: #2563eb;
    font-weight: 500;
    transition: color 0.3s;
}

.contact-value:hover {
    color: #1d4ed8;
}

.contact-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.footer {
    background-color: #1e293b;
    color: #94a3b8;
    padding: 32px 0;
    text-align: center;
    font-size: 0.9rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: #fff;
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .quote-card {
        padding: 20px;
    }

    .quote-text {
        font-size: 1rem;
    }

    .cards-grid {
        grid-template-columns: 1fr;
    }

    .card-wide {
        max-width: 100%;
    }

    .usage-grid {
        grid-template-columns: 1fr 1fr;
    }

    .contact-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .usage-grid {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: 1.5rem;
    }
}