/* ============================================
   PLINKORA — Clean & Bright Minimalist Theme
   ============================================ */

/* --- Custom Properties --- */
:root {
    --bg: #f6f8fb;
    --surface: #ffffff;
    --text: #0f172a;
    --text-muted: #64748b;
    --accent: #002fa7;
    --accent-hover: #0035be;
    --accent-light: #e8eefb;
    --border: rgba(15, 23, 42, 0.07);
    --radius: 12px;
    --radius-sm: 8px;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.06);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

img { max-width: 100%; display: block; }

/* --- Utilities --- */
.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    max-width: 520px;
    margin: 0 auto 48px;
    font-size: 1.05rem;
}

.section-label {
    font-family: var(--font-heading);
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    color: var(--accent);
}

/* --- Button --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: background 0.25s, transform 0.2s, box-shadow 0.25s;
    will-change: transform;
}

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

.btn--primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(0, 47, 167, 0.25);
}

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

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

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: background 0.3s, padding 0.3s, box-shadow 0.3s;
}

.nav--scrolled {
    background: rgba(246, 248, 251, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 10px 0;
    box-shadow: 0 1px 0 var(--border);
}

.nav__inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
}

.nav__logo svg {
    flex-shrink: 0;
}

.nav__links {
    display: flex;
    gap: 32px;
}

.nav__links a {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: color 0.2s;
    position: relative;
}

.nav__links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    transition: width 0.25s;
}

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

.nav__links a:hover::after {
    width: 100%;
}

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

.nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 50% 0%, rgba(0, 47, 167, 0.06) 0%, transparent 70%),
        radial-gradient(circle at 20% 80%, rgba(0, 47, 167, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

/* Dot pattern overlay */
.hero__bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
    background-size: 28px 28px;
    opacity: 0.6;
}

.hero__inner {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 720px;
}

.hero__badge {
    display: inline-block;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-light);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 28px;
}

.hero__title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 7vw, 4.25rem);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--text) 40%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__sub {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--text-muted);
    max-width: 540px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

/* --- About --- */
.about {
    padding: 80px 0;
}

.about__text {
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
}

.about__text .section-label {
    text-align: center;
}

.about__text p {
    color: var(--text-muted);
    line-height: 1.8;
    font-size: 1.08rem;
}

/* --- Services --- */
.services {
    padding: 100px 0;
    background: var(--surface);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.card {
    padding: 36px 32px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg);
    transition: transform 0.3s, box-shadow 0.3s;
    will-change: transform;
}

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

.card__icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--accent-light);
    color: var(--accent);
    margin-bottom: 20px;
}

.card__title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.card__desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.65;
}

/* --- Testimonials --- */
.testimonials {
    padding: 100px 0;
}

.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.review {
    padding: 28px 24px;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s;
    will-change: transform;
}

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

.review__quote {
    color: var(--accent);
    opacity: 0.18;
    margin-bottom: 12px;
    flex-shrink: 0;
}

.review__text {
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--text);
    flex: 1;
    margin-bottom: 16px;
}

.review__author {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --- Contact --- */
.contact {
    padding: 100px 0;
    background: var(--surface);
}

.form {
    max-width: 600px;
    margin: 0 auto;
}

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form__group {
    margin-bottom: 16px;
}

.form__group label {
    display: block;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 6px;
    color: var(--text);
}

.form__group input,
.form__group select,
.form__group textarea {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 47, 167, 0.1);
}

.form__group input::placeholder,
.form__group textarea::placeholder {
    color: #94a3b8;
}

.form__group select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2364748b' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    cursor: pointer;
}

.form__group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Validation error state */
.form__group input:user-invalid,
.form__group select:user-invalid,
.form__group textarea:user-invalid,
.form__group input.error,
.form__group select.error,
.form__group textarea.error {
    border-color: #dc2626;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.08);
}

.form__success {
    display: none;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
    padding: 14px 18px;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius-sm);
    color: #166534;
    font-weight: 500;
    font-size: 0.9rem;
}

.form__success.visible {
    display: flex;
}

.form__success svg {
    flex-shrink: 0;
    color: #16a34a;
}

/* --- Footer --- */
.footer {
    padding: 32px 0;
    border-top: 1px solid var(--border);
}

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

.footer__logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
}

.footer__copy {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* --- Scroll Reveal --- */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: transform, opacity;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.services__grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.services__grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.services__grid .reveal:nth-child(4) { transition-delay: 0.24s; }

.testimonials__grid .reveal:nth-child(2) { transition-delay: 0.06s; }
.testimonials__grid .reveal:nth-child(3) { transition-delay: 0.12s; }
.testimonials__grid .reveal:nth-child(4) { transition-delay: 0.18s; }
.testimonials__grid .reveal:nth-child(5) { transition-delay: 0.24s; }
.testimonials__grid .reveal:nth-child(6) { transition-delay: 0.30s; }

/* --- Responsive --- */
@media (max-width: 900px) {
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .testimonials__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about__text {
        text-align: center;
    }
}

@media (max-width: 640px) {
    .nav__links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 260px;
        height: 100vh;
        background: var(--surface);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 24px;
        box-shadow: -4px 0 24px rgba(0, 0, 0, 0.08);
        transition: right 0.35s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 999;
    }

    .nav__links.open {
        right: 0;
    }

    .nav__links a {
        font-size: 1.1rem;
    }

    .nav__toggle {
        display: flex;
        z-index: 1001;
    }

    .nav__toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .nav__toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav__toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

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

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

    .hero {
        min-height: auto;
        padding: 140px 0 80px;
    }

    .footer__inner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}