/* ========================================
   Ember PDF - Landing Page
   Warm Light Theme (matematikseruveni.pro style)
   ======================================== */

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

:root {
    --primary: #d6702c;
    --primary-hover: #c05e1f;
    --primary-light: rgba(214, 112, 44, 0.1);
    --bg: #f9f1e1;
    --bg-card: #ffffff;
    --bg-card-alt: #f5ead6;
    --text: #2d3436;
    --text-secondary: #5a5a5a;
    --text-muted: #888;
    --border: rgba(0, 0, 0, 0.06);
    --radius: 18px;
    --radius-lg: 24px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== HEADER ========== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(249, 241, 225, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1.15rem;
}

.logo-icon {
    font-size: 1.4rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-cta {
    background: var(--primary) !important;
    color: #fff !important;
    padding: 8px 18px;
    border-radius: 10px;
    font-weight: 600 !important;
    transition: background 0.2s !important;
}

.nav-cta:hover {
    background: var(--primary-hover) !important;
}

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

.menu-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s;
}

.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ========== HERO ========== */
.hero {
    padding: 80px 0 60px;
    text-align: center;
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.highlight {
    color: var(--primary);
    position: relative;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto 36px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.25s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(214, 112, 44, 0.25);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(214, 112, 44, 0.35);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.btn-secondary:hover {
    background: #f2e8d4;
    transform: translateY(-2px);
}

/* ========== SECTIONS ========== */
.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    margin-bottom: 12px;
}

.section-title p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 560px;
    margin: 0 auto;
}

/* ========== FEATURES ========== */
.features {
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 30px 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all 0.35s ease;
    opacity: 0;
    transform: translateY(20px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
}

/* ========== WHY US ========== */
.why-us {
    padding: 80px 0;
}

.why-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.why-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.35s ease;
}

.why-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.why-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.why-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 16px;
    line-height: 1.6;
}

.why-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.why-card ul li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.why-card ul li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 700;
    flex-shrink: 0;
}

.premium-card {
    background: linear-gradient(145deg, #fff8f0, #fff);
    border-color: rgba(214, 112, 44, 0.2);
}

/* ========== SUPPORT ========== */
.support {
    padding: 80px 0;
}

.support-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.35s ease;
}

.support-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.support-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 28px;
}

.support-link-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    background: var(--bg-card-alt);
    border-radius: 12px;
    font-size: 0.9rem;
    transition: background 0.2s;
}

.support-link-item:hover {
    background: #efe4cf;
}

.support-label {
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
}

.support-link-item a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.support-link-item a:hover {
    text-decoration: underline;
}

.support-buttons {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* ========== AD POLICY ========== */
.ad-policy {
    padding: 60px 0 80px;
}

.ad-policy-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.policy-item {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 28px 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.35s ease;
}

.policy-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.policy-item h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--primary);
}

.policy-item p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
}

/* ========== FOOTER ========== */
.footer {
    padding: 32px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-inner p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 6px;
}

.footer-ads a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.footer-ads a:hover {
    text-decoration: underline;
}

.footer-copy {
    margin-top: 12px !important;
    font-size: 0.8rem !important;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(249, 241, 225, 0.97);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }

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

    .menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2rem;
    }

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

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

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

    .ad-policy-grid {
        grid-template-columns: 1fr;
    }

    .support-buttons {
        flex-direction: column;
    }

    .support-buttons .btn {
        text-align: center;
        justify-content: center;
    }

    .section-title h2 {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 60px 0 40px;
    }

    .hero h1 {
        font-size: 1.7rem;
    }

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

    .btn {
        width: 100%;
        justify-content: center;
    }
}