/* ===== VARIABLES ===== */
:root {
    /* Royal Blue + Emerald palette — Light mode */
    --color-bg-dark: #FFFFFF;
    --color-bg-medium: #eef2ff;
    --color-bg-light: #FFFFFF;
    --color-white: #FFFFFF;
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-gold: #10b981;
    --color-text-dark: #1e293b;
    --color-text-light: #334155;
    --color-text-white: #1e293b;
    --color-border: rgba(59, 130, 246, 0.15);
    --color-card-bg: rgba(59, 130, 246, 0.04);
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    --max-width: 1200px;
    --header-height: 80px;
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-text-white);
    background-color: var(--color-bg-dark);
    font-size: 16px;
    line-height: 1.618;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* ===== UTILITY ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Golden ratio spacing: base 16px × 1.618^n
   16, 26, 42, 68, 110 */
.section {
    padding: 110px 0;
}

.section--light {
    background-color: var(--color-bg-light);
    color: var(--color-text-dark);
}

.section--medium {
    background-color: var(--color-bg-medium);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.618rem;   /* 42px — golden ratio step 3 */
    font-weight: 700;
    margin-bottom: 26px;    /* golden ratio step 1 */
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.125rem;   /* 18px */
    color: var(--color-text-light);
    margin-bottom: 42px;    /* golden ratio step 2 */
    max-width: 620px;
    line-height: 1.618;
}

.section--light .section-subtitle {
    color: #666;
}

.text-center {
    text-align: center;
}

.text-center .section-subtitle {
    margin-left: auto;
    margin-right: auto;
}

.text-accent {
    color: var(--color-accent);
}

.text-gold {
    color: var(--color-gold);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    text-align: center;
}

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

.btn--primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.btn--outline {
    background: transparent;
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
}

.btn--outline:hover {
    background-color: var(--color-accent);
    color: #FFFFFF;
}

.btn--gold {
    background-color: var(--color-gold);
    color: var(--color-bg-dark);
}

.btn--gold:hover {
    background-color: #059669;
    transform: translateY(-2px);
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text-dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-gold));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-white);
}

.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav__link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-light);
    position: relative;
    padding: 5px 0;
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-text-dark);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition);
}

.nav__link:hover::after,
.nav__link--active::after {
    width: 100%;
}

.nav__cta {
    padding: 10px 24px;
    font-size: 0.9rem;
}

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
    background: none;
    border: none;
    padding: 5px;
}

.burger__line {
    width: 28px;
    height: 3px;
    background-color: var(--color-text-dark);
    border-radius: 2px;
    transition: all var(--transition);
}

.burger--active .burger__line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

.burger--active .burger__line:nth-child(2) {
    opacity: 0;
}

.burger--active .burger__line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* ===== HERO ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 68px;             /* golden ratio step 3 */
    position: relative;
    z-index: 1;
}

.hero__content {
    flex: 1.618;            /* golden ratio proportion */
    max-width: 620px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--color-accent);
    margin-bottom: 26px;    /* golden step 1 */
}

.hero__title {
    font-family: var(--font-heading);
    font-size: 3.236rem;   /* 16 × 1.618^3 ≈ 68px / 21 ≈ 3.236rem */
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 26px;    /* golden step 1 */
}

.hero__subtitle {
    font-size: 1.125rem;   /* 18px */
    color: var(--color-text-light);
    margin-bottom: 42px;    /* golden step 2 */
    line-height: 1.618;
}

.hero__buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero__image {
    flex: 1;                /* content:image = 1.618:1 */
    max-width: 420px;
    height: 500px;
    background: linear-gradient(135deg, var(--color-bg-medium), var(--color-bg-dark));
    border-radius: 20px;
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
}

.hero__image::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-gold));
    z-index: -1;
    opacity: 0.3;
}

/* ===== STATS ===== */
.stats {
    padding: 68px 0;        /* golden step 3 */
    background-color: var(--color-bg-medium);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stats__item {
    padding: 20px;
}

.stats__number {
    font-family: var(--font-heading);
    font-size: 2.618rem;    /* golden ratio step 3 */
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.stats__number--gold {
    color: var(--color-gold);
}

.stats__label {
    font-size: 0.95rem;
    color: var(--color-text-light);
}

/* ===== CARDS ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 26px;              /* golden step 1 */
}

.card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 42px 26px;     /* golden step 2 / step 1 */
    transition: all var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.section--light .card {
    background: var(--color-white);
    border-color: rgba(59, 130, 246, 0.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
}

.section--light .card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.card__icon {
    width: 56px;            /* ~42 × 1.33 */
    height: 56px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.card__icon--gold {
    background: rgba(16, 185, 129, 0.1);
}

.card__title {
    font-family: var(--font-heading);
    font-size: 1.25rem;    /* 20px */
    font-weight: 700;
    margin-bottom: 10px;
}

.card__text {
    font-size: 0.9375rem;  /* 15px */
    color: var(--color-text-light);
    line-height: 1.618;
}

.section--light .card__text {
    color: #666;
}

/* ===== LICENSE BLOCK ===== */
.license {
    background: #FFFFFF;
    border: 2px solid #3b82f6;
    border-radius: 16px;
    padding: 40px;
    display: flex;
    align-items: center;
    gap: 30px;
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.12);
    position: relative;
    overflow: hidden;
}

.license::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    background: linear-gradient(to bottom, #3b82f6, #10b981);
}

.license__icon {
    flex-shrink: 0;
    width: 70px;
    height: 70px;
    background: #3b82f6;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.license__icon svg {
    width: 34px;
    height: 34px;
    stroke: #FFFFFF;
    fill: none;
}

.license__content {
    flex: 1;
}

.license__title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #2d3640;
}

.license__text {
    font-size: 0.95rem;
    color: #555;
    margin-bottom: 12px;
}

.license__link {
    display: inline-block;
    color: #FFFFFF;
    background: #3b82f6;
    padding: 8px 20px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all var(--transition);
}

.license__link:hover {
    background: #2563eb;
    text-decoration: none;
    transform: translateY(-1px);
}

/* ===== CTA SECTION ===== */
.cta-section {
    text-align: center;
    padding: 110px 0;       /* matches section padding */
    background: linear-gradient(135deg, var(--color-bg-medium), var(--color-bg-dark));
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-section .container {
    position: relative;
    z-index: 1;
}

.cta-section .section-title {
    margin-bottom: 16px;
}

.cta-section .section-subtitle {
    margin-bottom: 42px;    /* golden step 2 */
    margin-left: auto;
    margin-right: auto;
}

/* ===== ABOUT PAGE ===== */
.about-hero {
    display: flex;
    align-items: flex-start;
    gap: 68px;              /* golden step 3 */
    margin-bottom: 68px;
}

.about-hero__image {
    flex: 0 0 350px;
    height: 420px;
    border-radius: 20px;
    border: 1px solid var(--color-border);
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-bg-medium), var(--color-bg-dark));
}

.about-hero__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Certificates gallery */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 30px;
}

.certificate-item {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
    cursor: pointer;
    aspect-ratio: 4 / 3;
    background: var(--color-surface);
}

.certificate-item:hover {
    transform: scale(1.03);
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.certificate-item img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: top center;
}

/* Certificate lightbox */
.cert-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    cursor: zoom-out;
    padding: 30px;
}

.cert-lightbox--open {
    opacity: 1;
    visibility: visible;
}

.cert-lightbox img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    object-fit: contain;
}

.about-hero__content {
    flex: 1;
}

.about-hero__name {
    font-family: var(--font-heading);
    font-size: 2.618rem;   /* golden step 3 */
    font-weight: 800;
    margin-bottom: 10px;
}

.about-hero__role {
    font-size: 1.125rem;
    color: var(--color-accent);
    margin-bottom: 26px;    /* golden step 1 */
}

.about-hero__text {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.618;
    margin-bottom: 16px;
}

/* ===== TIMELINE ===== */
.timeline {
    position: relative;
    padding-left: 42px;     /* golden step 2 */
    margin-top: 42px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-gold));
}

.timeline__item {
    position: relative;
    margin-bottom: 42px;    /* golden step 2 */
    padding-left: 26px;     /* golden step 1 */
}

.timeline__item::before {
    content: '';
    position: absolute;
    left: -33px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--color-accent);
    border: 3px solid var(--color-bg-medium);
}

.timeline__year {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-accent);
    margin-bottom: 6px;
}

.timeline__text {
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===== COURSES ===== */
.course-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 0;
    overflow: hidden;
    transition: all var(--transition);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.course-card__header {
    padding: 30px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(59, 130, 246, 0.02));
    border-bottom: 1px solid var(--color-border);
}

.course-card__header--advanced {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.02));
}

.course-card__level {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-accent);
}

.course-card__level--advanced {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-gold);
}

.course-card__title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.course-card__desc {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.course-card__body {
    padding: 30px;
}

.course-card__list {
    margin-bottom: 24px;
}

.course-card__list li {
    padding: 8px 0;
    padding-left: 28px;
    position: relative;
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.course-card__list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

/* ===== COURSE ACCORDION ===== */
.courses-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.course-accordion {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    overflow: hidden;
    transition: all var(--transition);
}

.course-accordion:hover {
    border-color: var(--color-accent);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

.course-accordion__preview {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 30px;
    cursor: pointer;
    gap: 20px;
    user-select: none;
}

.course-accordion__info {
    flex: 1;
}

.course-accordion__title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 6px;
}

.course-accordion__subtitle {
    font-size: 1rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 12px;
}

.course-accordion__desc {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.618;
}

.course-accordion__toggle {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.08);
    color: var(--color-accent);
    transition: all var(--transition);
}

.course-accordion__toggle svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.course-accordion--open .course-accordion__toggle svg {
    transform: rotate(180deg);
}

.course-accordion__details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.course-accordion--open .course-accordion__details {
    max-height: 2000px;
}

.course-accordion__program {
    padding: 0 30px 30px;
    border-top: 1px solid var(--color-border);
    padding-top: 26px;
}

.course-accordion__program h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--color-heading);
}

.course-accordion__topics {
    counter-reset: topic;
    list-style: none;
    padding: 0;
}

.course-accordion__topics li {
    counter-increment: topic;
    padding: 14px 0;
    padding-left: 40px;
    position: relative;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.course-accordion__topics li:last-child {
    border-bottom: none;
}

.course-accordion__topics li::before {
    content: counter(topic);
    position: absolute;
    left: 0;
    top: 14px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-accent);
    font-size: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.course-accordion__topics li strong {
    display: block;
    color: var(--color-heading);
    font-weight: 600;
    margin-bottom: 4px;
}

.course-accordion__topics li span {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* ===== COURSE CARD PREVIEW (link to separate page) ===== */
.course-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
    border-radius: 16px;
    border: 1px solid var(--color-border);
    background: var(--color-card-bg);
    transition: all var(--transition);
    overflow: hidden;
}

.course-card-link:hover {
    border-color: var(--color-accent);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
    transform: translateY(-3px);
    text-decoration: none;
    color: inherit;
}

.course-card-preview {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 30px;
    gap: 20px;
}

.course-card-preview__info {
    flex: 1;
}

.course-card-preview__title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 6px;
}

.course-card-preview__subtitle {
    font-size: 1rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 12px;
}

.course-card-preview__desc {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.618;
}

.course-card-preview__arrow {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.08);
    color: var(--color-accent);
    transition: all var(--transition);
}

.course-card-link:hover .course-card-preview__arrow {
    background: var(--color-accent);
    color: #fff;
}

.course-card-preview__arrow svg {
    width: 20px;
    height: 20px;
}

/* ===== COURSE PAGE ===== */
.course-page__intro {
    font-size: 1.1rem;
    line-height: 1.618;
    color: var(--color-text);
    margin-bottom: 42px;
    max-width: 800px;
}

.course-page__section-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--color-heading);
}

.course-page__back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-accent);
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 26px;
    transition: all var(--transition);
}

.course-page__back:hover {
    color: var(--color-heading);
    text-decoration: none;
    transform: translateX(-3px);
}

.course-page__cta {
    margin-top: 30px;
}

/* ===== PRINCIPLES ===== */
.principles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.principle-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 30px;
    transition: all var(--transition);
}

.principle-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    border-color: var(--color-accent);
}

.principle-card__icon {
    width: 44px;
    height: 44px;
    margin-bottom: 16px;
}

.principle-card__icon svg {
    width: 100%;
    height: 100%;
}

.principle-card__title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-heading);
}

.principle-card__text {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.618;
}

/* ===== TABLE ===== */
.table-wrapper {
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.table th {
    background-color: var(--color-bg-medium);
    padding: 16px 20px;
    text-align: left;
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-accent);
    border-bottom: 1px solid var(--color-border);
}

.table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-light);
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

/* ===== INSTRUMENTS ===== */
.instruments-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.instrument-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    transition: all var(--transition);
}

.instrument-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
}

.instrument-card__icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.instrument-card__icon svg {
    width: 32px;
    height: 32px;
    fill: var(--color-accent);
}

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

.instrument-card__text {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== RISK BLOCK ===== */
.risk-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.risk-item {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 24px;
}

.risk-item__title {
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-accent);
}

.risk-item__text {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== TECH PAGE ===== */
.tech-block {
    display: flex;
    align-items: flex-start;
    gap: 40px;
    margin-bottom: 60px;
    padding: 40px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 16px;
}

.tech-block:nth-child(even) {
    flex-direction: row-reverse;
}

.tech-block__image {
    flex: 0 0 300px;
    height: 200px;
    background: var(--color-bg-medium);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    font-size: 0.85rem;
    border: 1px solid var(--color-border);
}

.tech-block__content {
    flex: 1;
}

.tech-block__title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.tech-block__text {
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.tech-block__list li {
    padding: 6px 0;
    padding-left: 24px;
    position: relative;
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.tech-block__list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* ===== CONTACT PAGE ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-form {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 40px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text-dark);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-light);
    opacity: 0.5;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-info__item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
}

.contact-info__icon {
    width: 48px;
    height: 48px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info__icon svg {
    width: 22px;
    height: 22px;
    fill: var(--color-accent);
}

.contact-info__label {
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-info__value {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.contact-info__value a {
    color: var(--color-accent);
}

.contact-info__value a:hover {
    text-decoration: underline;
}

.map-placeholder {
    width: 100%;
    height: 300px;
    background: var(--color-bg-medium);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    margin-top: 40px;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--color-bg-dark);
    border-top: 1px solid var(--color-border);
    padding: 68px 0 26px;   /* golden step 3 / step 1 */
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.618fr 1fr 1fr 1fr; /* golden ratio for brand column */
    gap: 42px;              /* golden step 2 */
    margin-bottom: 42px;
}

.footer__brand {
    max-width: 300px;
}

.footer__brand .logo {
    margin-bottom: 16px;
}

.footer__brand-text {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer__title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--color-text-dark);
}

.footer__links li {
    margin-bottom: 10px;
}

.footer__links a {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

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

.footer__social {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.footer__social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.footer__social-link:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.footer__social-link svg {
    width: 18px;
    height: 18px;
    fill: var(--color-text-light);
}

.footer__social-link:hover svg {
    fill: #FFFFFF;
}

.footer__bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer__copyright {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.footer__legal {
    display: flex;
    gap: 24px;
}

.footer__legal a {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

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

/* ===== PAGE HEADER ===== */
.page-header {
    padding-top: calc(var(--header-height) + 68px);
    padding-bottom: 68px;   /* golden step 3 */
    background: var(--color-bg-medium);
    border-bottom: 1px solid var(--color-border);
}

.page-header .section-title {
    margin-bottom: 12px;
}

.page-header .section-subtitle {
    margin-bottom: 0;
}

/* ===== BREADCRUMBS ===== */
.breadcrumbs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    font-size: 0.9rem;
}

.breadcrumbs a {
    color: var(--color-text-light);
}

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

.breadcrumbs span {
    color: var(--color-text-light);
    opacity: 0.5;
}

.breadcrumbs__current {
    color: var(--color-text-dark) !important;
    opacity: 1 !important;
}

/* ===== PRIVACY PAGE ===== */
.privacy-content {
    max-width: 800px;
    margin: 0 auto;
}

.privacy-content h2 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-top: 40px;
    margin-bottom: 16px;
    color: var(--color-accent);
}

.privacy-content p {
    color: var(--color-text-light);
    margin-bottom: 16px;
    line-height: 1.8;
}

.privacy-content ul {
    margin-bottom: 16px;
    padding-left: 20px;
}

.privacy-content ul li {
    color: var(--color-text-light);
    margin-bottom: 8px;
    padding-left: 16px;
    position: relative;
    list-style: none;
}

.privacy-content ul li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* ===== METHODOLOGY ===== */
.methodology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    counter-reset: method;
}

.method-step {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 30px;
    counter-increment: method;
    position: relative;
}

.method-step::before {
    content: counter(method);
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-accent);
    font-size: 0.9rem;
}

.method-step__title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 10px;
    padding-right: 50px;
}

.method-step__text {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ===== ANIMATIONS ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in--visible {
    opacity: 1;
    transform: translateY(0);
}