/* ==========================================================================
   Portfolio — AI Solutions Architect
   Color scheme:
   Primary accent:  #FF6200
   Secondary:       #D32F2F
   Text:            #212529
   Light bg:        #F8F9FA
   Card bg:         #FFFFFF
   Links:           #1976D2
   ========================================================================== */

:root {
    --color-primary: #FF6200;
    --color-primary-dark: #E55800;
    --color-secondary: #D32F2F;
    --color-text: #212529;
    --color-text-muted: #6C757D;
    --color-bg-light: #F8F9FA;
    --color-bg-white: #FFFFFF;
    --color-link: #1976D2;
    --color-border: #DEE2E6;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --shadow-sm: 0 2px 8px rgba(33, 37, 41, 0.06);
    --shadow-md: 0 4px 20px rgba(33, 37, 41, 0.1);
    --shadow-lg: 0 8px 40px rgba(255, 98, 0, 0.12);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --navbar-height: 72px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

main {
    padding-top: var(--navbar-height);
}

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

a:hover {
    color: #1565C0;
}

/* ---- Navbar ---- */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    padding: 0.75rem 0;
    transition: box-shadow var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-brand {
    font-size: 1.25rem;
    color: var(--color-text) !important;
}

.brand-accent {
    color: var(--color-primary);
}

.nav-link {
    color: var(--color-text) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    position: relative;
    transition: color var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary) !important;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
}

/* ---- Buttons ---- */
.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    font-weight: 600;
    border-radius: 8px;
    padding: 0.625rem 1.5rem;
    transition: all var(--transition);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 98, 0, 0.3);
}

.btn-outline-primary {
    color: var(--color-primary);
    border-color: var(--color-primary);
    font-weight: 600;
    border-radius: 8px;
    transition: all var(--transition);
}

.btn-outline-primary:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.btn-link.link-primary {
    color: var(--color-link);
    font-weight: 600;
}

/* ---- Flash messages ---- */
.flash-container {
    position: fixed;
    top: calc(var(--navbar-height) + 1rem);
    right: 1rem;
    z-index: 1050;
    max-width: 400px;
}

/* ---- Hero ---- */
.hero-section {
    position: relative;
    background: linear-gradient(135deg, var(--color-bg-light) 0%, #FFFFFF 50%, #FFF5EE 100%);
    overflow: hidden;
}

.hero-bg-pattern {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 98, 0, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(211, 47, 47, 0.04) 0%, transparent 40%),
        linear-gradient(rgba(255, 98, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 98, 0, 0.03) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge,
.section-badge {
    display: inline-block;
    background: rgba(255, 98, 0, 0.1);
    color: var(--color-primary);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.375rem 1rem;
    border-radius: 50px;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.hero-lead {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.hero-text {
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    max-width: 540px;
}

.hero-result {
    margin-top: 1.5rem;
    border-left: 4px solid var(--color-primary) !important;
    border-radius: var(--radius);
    background: var(--color-bg-white);
}

.hero-result .result-label {
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.hero-result .bi-check-circle-fill {
    color: var(--color-primary);
}

/* ---- Profile photo ---- */
.profile-photo-wrap {
    position: relative;
    display: inline-block;
}

.profile-photo {
    width: 100%;
    max-width: 320px;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.profile-photo-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, rgba(255, 98, 0, 0.12), rgba(211, 47, 47, 0.08));
    color: var(--color-primary);
}

.profile-photo-placeholder i {
    font-size: 4rem;
    opacity: 0.5;
}

.hero-photo-block {
    position: relative;
    display: flex;
    justify-content: center;
    padding: 2rem;
}

.hero-photo-block .profile-photo-wrap {
    width: 100%;
    max-width: 380px;
}

.hero-photo-block .profile-photo {
    max-width: none;
    width: 100%;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
}

.hero-photo-block::before {
    content: '';
    position: absolute;
    inset: 10%;
    border: 2px solid rgba(255, 98, 0, 0.15);
    border-radius: 28px;
    transform: rotate(3deg);
    pointer-events: none;
}

.hero-photo-badge {
    position: absolute;
    bottom: 2rem;
    right: 0;
    background: var(--color-bg-white);
    border-radius: 50px;
    padding: 0.625rem 1.25rem;
    box-shadow: var(--shadow-md);
    font-weight: 600;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hero-photo-badge i {
    color: var(--color-primary);
}

.contact-info-card .profile-photo-wrap {
    width: 160px;
    margin: 0 auto;
}

.contact-info-card .profile-photo {
    max-width: 160px;
}

.about-sidebar .profile-photo-wrap {
    width: 200px;
    margin: 0 auto;
}

.about-sidebar .profile-photo {
    max-width: 200px;
}

/* ---- Contact links ---- */
.contact-links li + li {
    margin-top: 0.75rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    transition: all var(--transition);
}

.contact-link:hover {
    border-color: rgba(255, 98, 0, 0.35);
    box-shadow: var(--shadow-sm);
    color: var(--color-text);
    transform: translateX(4px);
}

.contact-link-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(255, 98, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-link-icon i {
    font-size: 1.25rem;
    color: var(--color-primary);
}

.contact-link-icon-telegram {
    background: rgba(25, 118, 210, 0.1);
}

.contact-link-icon-telegram i {
    color: var(--color-link);
}

.contact-link-icon-phone {
    background: rgba(255, 98, 0, 0.1);
}

.contact-link-icon-max {
    background: transparent;
    padding: 0;
}

.contact-link-icon-max .max-icon {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    object-fit: contain;
    display: block;
}

.max-icon-footer {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    object-fit: contain;
    vertical-align: -2px;
}

.contact-link-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-muted);
    margin-bottom: 0.125rem;
}

.contact-link-value {
    display: block;
    font-weight: 600;
    font-size: 0.9375rem;
    word-break: break-all;
}

.footer-contacts {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-contact-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    transition: color var(--transition);
}

.footer-contact-item:hover {
    color: var(--color-primary);
}

.footer-contact-item i {
    color: var(--color-primary);
    font-size: 1.125rem;
}

.footer-contact-item:last-child i {
    color: var(--color-link);
}

/* ---- Hero visual (legacy, kept for reference) ---- */
.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-center {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--color-primary), #FF8534);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    animation: pulse 3s ease-in-out infinite;
}

.visual-center i {
    font-size: 3rem;
    color: white;
}

.visual-card {
    position: absolute;
    background: var(--color-bg-white);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    font-size: 0.875rem;
    animation: float 4s ease-in-out infinite;
}

.visual-card i {
    font-size: 1.25rem;
    color: var(--color-primary);
}

.visual-card.card-1 { top: 10%; left: 5%; animation-delay: 0s; }
.visual-card.card-2 { top: 60%; right: 0; animation-delay: 1s; }
.visual-card.card-3 { bottom: 10%; left: 15%; animation-delay: 2s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 8px 40px rgba(255, 98, 0, 0.2); }
    50% { box-shadow: 0 8px 60px rgba(255, 98, 0, 0.35); }
}

/* ---- Sections ---- */
.section-padding {
    padding: 5rem 0;
}

.section-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.bg-light {
    background-color: var(--color-bg-light) !important;
}

/* ---- Stats ---- */
.stat-card {
    background: var(--color-bg-white);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-card-accent .stat-number {
    color: var(--color-primary);
}

.stat-card-red .stat-number {
    color: var(--color-secondary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

/* ---- Advantage cards ---- */
.advantage-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 98, 0, 0.2);
}

.advantage-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 98, 0, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.advantage-icon i {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.advantage-card h5 {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* ---- Case cards ---- */
.case-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
    position: relative;
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 98, 0, 0.25);
}

.case-card-large {
    padding: 2.5rem;
}

.case-number {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 3rem;
    font-weight: 700;
    color: rgba(255, 98, 0, 0.1);
    line-height: 1;
}

.case-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), #FF8534);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.case-icon i {
    font-size: 1.25rem;
    color: white;
}

.case-card h3,
.case-card h5 {
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.case-meta {
    margin: 1.25rem 0;
}

.case-meta-item {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.case-meta-item strong {
    color: var(--color-text);
}

.case-link {
    color: var(--color-link);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    transition: gap var(--transition);
}

.case-link:hover {
    gap: 0.5rem;
}

/* ---- Contact ---- */
.contact-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.contact-info-card {
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--color-border);
}

.contact-help-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.contact-help-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9375rem;
}

.contact-help-list li:last-child {
    border-bottom: none;
}

.contact-help-list i {
    color: var(--color-primary);
    font-size: 1.125rem;
    margin-top: 2px;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.2rem rgba(255, 98, 0, 0.15);
}

.form-label {
    font-weight: 500;
}

/* ---- Page header ---- */
.page-header {
    background: linear-gradient(135deg, var(--color-bg-light), #FFFFFF);
    padding: 3rem 0 2rem;
    border-bottom: 1px solid var(--color-border);
}

.page-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--color-text-muted);
    font-size: 1.125rem;
    margin-bottom: 0;
}

.breadcrumb {
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.breadcrumb-item a {
    color: var(--color-link);
}

/* ---- About ---- */
.about-content .about-paragraph {
    font-size: 1.0625rem;
    line-height: 1.8;
    margin-bottom: 1.25rem;
    color: var(--color-text);
}

.about-preview-text p {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.about-sidebar {
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--color-border);
    position: sticky;
    top: calc(var(--navbar-height) + 2rem);
}

.about-sidebar h5 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.competency-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.competency-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    font-size: 0.9375rem;
}

.competency-list i {
    color: var(--color-primary);
}

.education-card {
    background: var(--color-bg-white);
    border-radius: var(--radius);
    padding: 1rem;
    border-left: 3px solid var(--color-primary);
}

/* ---- Case detail ---- */
.case-detail {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.case-detail-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary), #FF8534);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.case-detail-icon i {
    font-size: 1.75rem;
    color: white;
}

.case-detail-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin-bottom: 2rem;
}

.case-detail-block {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.case-detail-block:last-of-type {
    border-bottom: none;
}

.case-detail-block h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.case-detail-block h2 i {
    color: var(--color-primary);
}

.case-detail-result {
    background: rgba(255, 98, 0, 0.05);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid rgba(255, 98, 0, 0.15);
    border-bottom: 1px solid rgba(255, 98, 0, 0.15) !important;
}

.case-detail-result h2 i {
    color: var(--color-secondary);
}

.case-detail-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

/* ---- Footer ---- */
.site-footer {
    background: var(--color-bg-light);
    border-top: 1px solid var(--color-border);
    padding: 3rem 0 2rem;
    margin-top: 2rem;
}

.footer-brand {
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.footer-heading {
    font-weight: 600;
    font-size: 0.9375rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.footer-links li {
    margin-bottom: 0.5rem;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

.footer-links a {
    color: var(--color-text-muted);
    transition: color var(--transition);
}

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

.footer-divider {
    margin: 2rem 0 1.5rem;
    opacity: 0.5;
}

/* ---- 404 ---- */
.error-page {
    padding: 4rem 0;
}

.error-code {
    font-size: 6rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

/* ---- Animations ---- */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ---- Admin ---- */
.admin-body {
    background: var(--color-bg-light);
    min-height: 100vh;
}

.admin-navbar {
    background: var(--color-text) !important;
}

.admin-login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.admin-login-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-md);
}

.admin-login-icon {
    font-size: 3rem;
    color: var(--color-primary);
}

.admin-dashboard {
    max-width: 1400px;
}

.admin-table-wrapper {
    background: var(--color-bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.admin-table {
    margin-bottom: 0;
}

.admin-table thead {
    background: var(--color-bg-light);
}

.admin-table th {
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-text-muted);
    border-bottom-width: 1px;
    white-space: nowrap;
}

.table-row-unread {
    background: rgba(255, 98, 0, 0.04);
}

.table-row-unread td:first-child {
    border-left: 3px solid var(--color-primary);
}

.message-preview {
    max-width: 280px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.admin-empty-state {
    background: var(--color-bg-white);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

/* ---- Responsive ---- */
@media (max-width: 991.98px) {
    .hero-section .min-vh-100 {
        min-height: auto !important;
    }

    .section-padding {
        padding: 3.5rem 0;
    }

    .case-detail {
        padding: 2rem 1.5rem;
    }

    .contact-card {
        padding: 1.5rem;
    }

    .about-sidebar {
        position: static;
    }
}

@media (max-width: 767.98px) {
    .flash-container {
        left: 1rem;
        right: 1rem;
        max-width: none;
    }

    .hero-actions .btn {
        display: block;
        width: 100%;
        margin-bottom: 0.75rem;
    }

    .hero-actions .btn.me-2 {
        margin-right: 0 !important;
    }

    .case-detail-nav {
        flex-direction: column;
    }

    .case-detail-nav .btn {
        width: 100%;
    }

    .admin-table-wrapper {
        font-size: 0.875rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .fade-in {
        opacity: 1;
        transform: none;
    }
}