/* ===================================
   OCTAGON WEBSITE - MODERN CSS
   Version 2.0 - Optimized & Modern
   =================================== */

/* CSS VARIABLES */
:root {
    /* Colors */
    --primary: #ff4c4c;
    --primary-dark: #d93636;
    --primary-light: #ff6b6b;
    --secondary: #2c2c2c;
    --accent: #ffd700;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --bg-dark: #000000;
    --bg-card: #1a1a1a;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Typography */
    --font-primary: 'Roboto', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.3);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

/* Fade transition */
body {
    opacity: 1;
    transition: opacity var(--transition-slow);
}

body.fade-out {
    opacity: 1;
}

.no-scroll {
    overflow: hidden;
}

/* FLUID TYPOGRAPHY */
h1 {
    font-size: clamp(2.5rem, 5vw + 1rem, 6.75rem);
    font-weight: var(--font-weight-medium);
    line-height: 1.1;
}

h2 {
    font-size: clamp(1.875rem, 3vw + 1rem, 3.75rem);
    font-weight: var(--font-weight-medium);
    line-height: 1.2;
}

h3 {
    font-size: clamp(1.5rem, 2vw + 0.5rem, 2.25rem);
    font-weight: var(--font-weight-regular);
    line-height: 1.3;
}

h4 {
    font-size: clamp(1.25rem, 1.5vw + 0.5rem, 1.875rem);
    font-weight: var(--font-weight-regular);
}

h5 {
    font-size: clamp(1.125rem, 1vw + 0.5rem, 1.5rem);
    font-weight: var(--font-weight-regular);
}

h6 {
    font-size: clamp(1rem, 0.5vw + 0.5rem, 1.25rem);
    font-weight: var(--font-weight-medium);
}

p, .text {
    font-size: clamp(1rem, 0.5vw + 0.75rem, 1.25rem);
    line-height: 1.8;
    color: var(--text-primary);
    margin: var(--space-sm) 0;
}

/* TITLE STYLES */
.thin-title {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    font-weight: var(--font-weight-light);
    color: var(--primary);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.big-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: var(--font-weight-light);
    color: var(--text-primary);
    margin: var(--space-md) 0;
    position: relative;
}

.big-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    margin: var(--space-md) auto 0;
    border-radius: var(--radius-full);
}

.lined-text {
    display: flex;
    align-items: center;
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    color: var(--primary);
    margin: 0;
    position: relative;
    text-align: center;
    width: 100%;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.lined-text::before,
.lined-text::after {
    content: "";
    flex: 1;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--primary));
    margin: 0 var(--space-sm);
}

.lined-text::after {
    background: linear-gradient(to left, transparent, var(--primary));
}

/* NAVIGATION */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    width: 100%;
    padding: 0 var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    width: auto;
}

.logo p {
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 1px;
    transition: color var(--transition-base);
}

.logo a {
    text-decoration: none;
}

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

.nav-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    list-style: none;
    transition: background-color var(--transition-base);
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: var(--font-weight-regular);
    font-size: 1rem;
    position: relative;
    padding: var(--space-xs) 0;
    transition: color var(--transition-base);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-base);
}

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

.nav-links a:hover::after {
    width: 100%;
}

/* Burger Menu */
.burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    gap: 5px;
    /* 44px minimum hit area */
    width: 44px;
    height: 44px;
    margin-right: -10px;
}

.burger div {
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-base);
}

.toggle .line1 {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.toggle .line2 {
    opacity: 0;
}

.toggle .line3 {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* BUTTONS */
.button-white {
    display: inline-block;
    margin-top: var(--space-md);
}

.button-white a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    background-color: transparent;
    color: var(--primary);
    text-decoration: none;
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    border: 2px solid var(--text-primary);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
    min-height: 48px;
    isolation: isolate;
}

.button-white a::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--primary);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
    z-index: -1;
}

.button-white a:hover {
    color: var(--text-primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(255, 76, 76, 0.3);
}

.button-white a:hover::before {
    width: 400px;
    height: 400px;
}

/* SOCIAL MEDIA BAR */
.social-bar {
    position: absolute;
    top: 50%;
    left: var(--space-lg);
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    z-index: 10;
}

.social-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.social-icon img {
    width: 28px;
    height: 28px;
    transition: transform var(--transition-base), filter var(--transition-base);
    filter: invert(100%);
}

.social-icon a {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.social-icon .social-text {
    opacity: 0;
    visibility: hidden;
    color: var(--text-primary);
    margin-left: var(--space-sm);
    font-size: 0.875rem;
    transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base);
    white-space: nowrap;
    transform: translateX(-10px);
}

.social-icon:hover img {
    transform: scale(1.15);
    filter: invert(0%) sepia(94%) saturate(7461%) hue-rotate(357deg) brightness(105%) contrast(109%);
}

.social-icon:hover .social-text {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

/* CERTIFICATIONS SECTION */
.certifications {
    background-color: #f5f5f5;
    padding: var(--space-xl) var(--space-lg);
    border-top: 1px solid #e0e0e0;
    border-bottom: 1px solid #e0e0e0;
}

.cert-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.cert-container img {
    max-height: 80px;
    max-width: 100%;
    object-fit: contain;
    transition: transform var(--transition-base), filter var(--transition-base);
    filter: grayscale(0.2);
}

.cert-container img:hover {
    transform: scale(1.08);
    filter: none;
}

/* FOOTER */
.footer {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    padding: var(--space-2xl) var(--space-lg);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
    padding: var(--space-xl) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
    color: var(--primary);
    font-weight: var(--font-weight-medium);
}

.footer-section a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin: var(--space-xs) 0;
    font-size: 0.9375rem;
    transition: color var(--transition-base), transform var(--transition-base);
}

.footer-section a:hover {
    color: var(--primary);
    transform: translateX(4px);
}

.footer-section p {
    margin: var(--space-xs) 0;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.footer-social {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.footer-social img {
    width: 20px;
    height: 20px;
    filter: invert(100%);
    transition: filter var(--transition-base);
}

.footer-social a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.footer-social a:hover img {
    filter: invert(0%);
}

.footer-bottom {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
    padding-top: var(--space-lg);
}

/* SCROLL PROGRESS INDICATOR */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    z-index: 9999;
    transition: width 0.1s ease;
}

/* RESPONSIVE MEDIA QUERIES */
@media screen and (max-width: 1200px) {
    :root {
        --space-xl: 2.5rem;
        --space-2xl: 3rem;
    }
    
    nav {
        padding: 0 var(--space-md);
    }
}

@media screen and (max-width: 900px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        height: 100dvh;
        width: 100%;
        flex-direction: column;
        background-color: rgba(0, 0, 0, 0.98);
        transform: translateX(100%);
        /* hidden, not merely moved — otherwise the panel can be swiped
           into view and its links stay keyboard-reachable when closed */
        visibility: hidden;
        pointer-events: none;
        transition: transform var(--transition-base),
                    visibility 0s linear var(--transition-base);
    }

    .nav-links.nav-active {
        transform: translateX(0);
        visibility: visible;
        pointer-events: auto;
        transition: transform var(--transition-base), visibility 0s;
    }

    .burger {
        display: flex;
        z-index: 100;
    }

    /* generous tap targets in the slide-out menu */
    .nav-links {
        gap: var(--space-sm);
        justify-content: center;
    }

    .nav-links a {
        display: block;
        padding: var(--space-sm) var(--space-lg);
        font-size: 1.125rem;
    }
}

@media screen and (max-width: 768px) {
    nav {
        padding: 0 var(--space-sm);
    }
    
    .social-bar {
        position: static;
        transform: none;
        flex-direction: row;
        justify-content: center;
        padding: var(--space-lg) 0;
    }
    
    .social-icon .social-text {
        opacity: 1;
        visibility: visible;
        transform: translateX(0);
        font-size: 0.75rem;
    }

    .social-icon a {
        flex-direction: column;
        gap: 4px;
        padding: var(--space-xs);
        min-width: 48px;
        min-height: 48px;
        justify-content: center;
    }

    .social-icon .social-text {
        margin-left: 0;
    }

    .social-bar {
        gap: var(--space-sm);
        flex-wrap: wrap;
    }
    
    .footer-sections {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .cert-container {
        gap: var(--space-md);
    }
    
    .cert-container img {
        max-height: 60px;
    }
}

@media screen and (max-width: 480px) {
    nav {
        height: 64px;
    }

    .logo p {
        font-size: 0.9375rem;
    }

    .footer {
        padding: var(--space-xl) var(--space-sm);
    }

    .cert-container {
        gap: var(--space-sm);
    }

    .cert-container img {
        max-height: 44px;
    }
}

/* PRINT STYLES */
@media print {
    .nav-links,
    .social-bar,
    .burger,
    .scroll-progress {
        display: none !important;
    }
}

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

/* SCROLL REVEAL — applied by main.js.
   Written as an animation, not a hidden default state, so content is
   still visible if JavaScript fails to load. */
@keyframes riseIn {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: none; }
}

.animate-in {
    animation: riseIn 0.7s cubic-bezier(0.2, 0.8, 0.3, 1) both;
}

/* MOBILE NAV LINK ENTRANCE — referenced by main.js */
@keyframes navLinkSlide {
    from { opacity: 0; transform: translateX(50px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* Visible keyboard focus everywhere */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
}

/* FORM MESSAGES */
.form-message {
    padding: 15px 20px;
    margin-top: 20px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: var(--font-weight-medium);
}

.form-message.warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

/* UTILITIES */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}