/* ===================================== */
/* ROOT COLORS + ANIMATED GRADIENT */
/* ===================================== */

:root{
    --bg-start: #0a0c12;
    --bg-mid: #111827;
    --bg-end: #0f172a;
    --text: #ffffff;
    --text-soft: #cbd5e1;
    --card: rgba(255,255,255,.04);
    --card-border: rgba(255,255,255,.07);
    --navbar-bg: rgba(5,7,12,.65);
    --gradient1-start: #e2e6ee;
    --gradient1-end: #c5d3f0;
    --gradient2-start: #a6b8e4;
    --gradient2-end: #7a9ad6;
    --shadow: rgba(166,184,228,.15);
    --btn-hover: rgba(166,184,228,.12);
    --accent-glow: #a6b8e4;
}

/* LIGHT MODE */
body.light-mode{
    --bg-start: #f0f4fa;
    --bg-mid: #e8edf6;
    --bg-end: #dfe6f2;
    --text: #0f172a;
    --text-soft: #334155;
    --card: rgba(255,255,255,.8);
    --card-border: rgba(0,0,0,.06);
    --navbar-bg: rgba(255,255,255,.75);
    --gradient1-start: #8ca3dd;
    --gradient1-end: #6b8bc9;
    --gradient2-start: #5d79be;
    --gradient2-end: #4a61a3;
    --shadow: rgba(93,121,190,.2);
    --btn-hover: rgba(93,121,190,.12);
    --accent-glow: #5d79be;
}

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:'Poppins',sans-serif;
    color:var(--text);
    overflow-x:hidden;
    transition: color 0.4s cubic-bezier(0.2, 0.95, 0.3, 1.05);
}

/* SMOOTH BACKGROUND GRADIENT TRANSITION */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse at 30% 40%, var(--bg-mid) 0%, var(--bg-start) 50%, var(--bg-end) 100%);
    z-index: -6;
    transition: background 0.5s cubic-bezier(0.2, 0.95, 0.3, 1.05);
    will-change: background;
}

body.light-mode::before {
    background: radial-gradient(ellipse at 70% 30%, var(--bg-mid) 0%, var(--bg-start) 60%, var(--bg-end) 100%);
}

/* SMOOTH FLOATING ORBS TRANSITION */
.glow-bg{
    position:fixed;
    inset:0;
    z-index:-5;
    pointer-events:none;
}
.glow-sphere{
    position:absolute;
    border-radius:50%;
    filter:blur(140px);
    opacity:0.55;
    transition: background 0.5s cubic-bezier(0.2, 0.95, 0.3, 1.05), transform 0.4s ease;
    animation: floatOrb 18s infinite alternate ease-in-out;
}
.glow-sphere.one{
    width:550px;
    height:550px;
    background: var(--gradient1-start);
    top:-180px;
    left:-120px;
}
.glow-sphere.two{
    width:500px;
    height:500px;
    background: var(--gradient2-start);
    bottom:-120px;
    right:-80px;
    animation-delay: -5s;
}
.glow-sphere.three{
    width:400px;
    height:400px;
    background: var(--gradient2-end);
    bottom:15%;
    left:15%;
    opacity:0.35;
    animation-delay: -10s;
}
body.light-mode .glow-sphere.one{
    background: #b7c9f0;
}
body.light-mode .glow-sphere.two{
    background: #6d8ed1;
}
body.light-mode .glow-sphere.three{
    background: #8aa9df;
}

@keyframes floatOrb {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(40px, -30px) scale(1.08); }
}

/* ===================================== */
/* HORIZONTAL NAVBAR - EDGE ALIGNMENT */
/* ===================================== */

nav{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(20px);
    background: var(--navbar-bg);
    border-bottom: 1px solid var(--card-border);
    transition: background 0.4s cubic-bezier(0.2, 0.95, 0.3, 1.05), border-color 0.4s cubic-bezier(0.2, 0.95, 0.3, 1.05);
}

.nav-container{
    max-width: 1600px;
    margin: 0 auto;
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo{
    display: flex;
    align-items: center;
    gap: 14px;
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.2px;
    flex-shrink: 0;
}

.logo img{
    width: 48px;
    height: 48px;
    object-fit: contain;
    filter: drop-shadow(0 0 8px var(--shadow));
    transition: filter 0.3s ease;
}

.logo .logo-text{
    background: linear-gradient(135deg, var(--gradient1-start), var(--gradient2-end));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
    transition: background 0.4s ease;
}

.nav-right{
    display: flex;
    align-items: center;
    gap: 28px;
    flex-shrink: 0;
}

.nav-links{
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a{
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease, opacity 0.2s;
    position: relative;
    opacity: 0.9;
}

.nav-links a::after{
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 0%;
    height: 2px;
    background: linear-gradient(90deg, var(--gradient1-start), var(--gradient2-start));
    transition: width 0.3s ease;
}

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

.nav-links a:hover{
    opacity: 1;
}

.theme-toggle{
    width: 46px;
    height: 46px;
    border-radius: 30px;
    border: 1px solid var(--card-border);
    background: var(--card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.2, 0.95, 0.3, 1.05);
    backdrop-filter: blur(8px);
    padding: 0;
}

.theme-toggle svg{
    width: 22px;
    height: 22px;
    stroke: var(--text);
    stroke-width: 1.8;
    fill: none;
    transition: stroke 0.3s ease, transform 0.2s ease;
}

.theme-toggle:hover{
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--shadow);
}

.theme-toggle:hover svg{
    transform: rotate(15deg);
}

/* responsive */
@media (max-width: 680px) {
    .nav-container { padding: 12px 20px; flex-wrap: wrap; }
    .nav-links { gap: 18px; }
    .nav-right { gap: 16px; }
    .logo .logo-text { font-size: 0.9rem; }
    .logo img { width: 38px; height: 38px; }
}
@media (max-width: 550px) {
    .nav-links { gap: 12px; }
    .nav-links a { font-size: 0.8rem; }
    .theme-toggle { width: 40px; height: 40px; }
}

/* ===================================== */
/* HERO & GLOBAL */
/* ===================================== */

.hero{
    min-height: 95vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 140px 20px 90px;
}
.hero-content{
    max-width: 1000px;
}
.hero-logo img{
    width: 150px;
    height: 150px;
    object-fit: contain;
    margin-bottom: 28px;
    animation: logoFloat 4.5s ease-in-out infinite;
    filter: drop-shadow(0 0 28px var(--shadow));
    transition: filter 0.3s ease;
}
@keyframes logoFloat{
    0%,100%{ transform:translateY(0px);}
    50%{ transform:translateY(-14px);}
}

.hero h1{
    font-size: 5rem;
    line-height: 1.1;
    margin-bottom: 22px;
    background: linear-gradient(115deg, 
        var(--gradient1-start) 0%, 
        var(--gradient2-start) 35%,
        var(--gradient1-end) 65%,
        var(--gradient2-end) 100%);
    background-size: 300% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: smoothGradientFlow 8s ease infinite;
    transition: background 0.4s ease;
}

@keyframes smoothGradientFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero p{
    font-size: 1.12rem;
    color: var(--text-soft);
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    transition: color 0.3s ease;
}
.btn{
    padding: 16px 38px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    backdrop-filter: blur(12px);
    background: var(--card);
    border: 1px solid var(--card-border);
    color: var(--text);
    transition: all 0.3s cubic-bezier(0.2, 0.95, 0.3, 1.05);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}
.btn svg{
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 1.8;
    fill: none;
    transition: stroke 0.2s ease;
}
.btn-primary{
    background: linear-gradient(110deg, rgba(166,184,228,0.18), rgba(226,230,238,0.08));
}
.btn:hover{
    transform: translateY(-5px);
    box-shadow: 0 18px 32px var(--shadow);
}
.hero-buttons{
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

/* sections */
section{
    padding: 100px 24px;
}
.container{
    max-width: 1280px;
    margin: auto;
}
.section-title{
    text-align: center;
    margin-bottom: 70px;
}
.section-title h2{
    font-size: 3rem;
    background: linear-gradient(115deg, var(--gradient1-start), var(--gradient2-start), var(--gradient1-end));
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: smoothGradientFlow 8s ease infinite;
    margin-bottom: 14px;
    transition: background 0.4s ease;
}
.section-title p{
    color: var(--text-soft);
    transition: color 0.3s ease;
}

.features-grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}
.feature-card{
    background: var(--card);
    border: 1px solid var(--card-border);
    padding: 38px 30px;
    border-radius: 36px;
    backdrop-filter: blur(12px);
    transition: all 0.35s cubic-bezier(0.2, 0.95, 0.3, 1.05);
    cursor: pointer;
}
.feature-card:hover{
    transform: translateY(-10px);
    box-shadow: 0 22px 48px var(--shadow);
}
.feature-icon{
    width: 68px;
    height: 68px;
    background: linear-gradient(145deg, var(--gradient1-start), var(--gradient2-start));
    border-radius: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: background 0.3s ease;
}
.feature-icon svg{
    width: 34px;
    height: 34px;
    stroke: white;
    stroke-width: 1.7;
    fill: none;
}

/* Unavailable Mode Styles */
.unavailable-mode .feature-card,
.unavailable-mode .gallery-item,
.unavailable-mode .faq-item {
    opacity: 0.5;
    pointer-events: none;
    cursor: not-allowed;
}

.unavailable-mode .feature-card h3 {
    color: var(--text-soft);
}

.unavailable-mode .gallery-item img {
    filter: grayscale(0.5);
}

.gallery-grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.gallery-item{
    border-radius: 32px;
    overflow: hidden;
    height: 270px;
    position: relative;
    border: 1px solid var(--card-border);
    transition: all 0.35s cubic-bezier(0.2, 0.95, 0.3, 1.05);
    cursor: pointer;
}
.gallery-item:hover{
    transform: translateY(-8px);
}
.gallery-item img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease, filter 0.3s ease;
}
.gallery-item:hover img{
    transform: scale(1.07);
}
.gallery-overlay{
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    padding: 24px;
    font-weight: 600;
    color: white;
}

.faq-container{
    max-width: 800px;
    margin: auto;
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.faq-item{
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 30px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.2, 0.95, 0.3, 1.05);
}
.faq-question{
    padding: 24px 30px;
    display: flex;
    justify-content: space-between;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.2s ease;
}
.faq-question svg{
    width: 20px;
    height: 20px;
    stroke: var(--text);
    stroke-width: 2;
    transition: transform 0.35s ease, stroke 0.2s ease;
}
.faq-answer{
    max-height: 0;
    padding: 0 30px;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.35s ease, padding 0.35s ease;
    color: var(--text-soft);
}
.faq-item.active .faq-answer{
    max-height: 220px;
    padding: 0 30px 28px;
    opacity: 1;
}
.faq-item.active .faq-question svg{
    transform: rotate(45deg);
}

/* fade-in animation for scroll */
.fade-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.2, 0.9, 0.3, 1.1), transform 0.8s cubic-bezier(0.2, 0.9, 0.3, 1.1);
}

.fade-on-scroll.fade-in-view {
    opacity: 1;
    transform: translateY(0);
}

/* ========== MODERN COOL FOOTER ========== */
.cool-footer{
    margin-top: 50px;
    background: rgba(0,0,0,0.2);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--card-border);
    padding: 3rem 2rem 1.5rem;
    transition: all 0.4s cubic-bezier(0.2, 0.95, 0.3, 1.05);
}
.footer-inner{
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 50px;
}
.footer-brand h3{
    font-size: 1.7rem;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--gradient1-start), var(--gradient2-start));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: background 0.4s ease;
}
.footer-brand p{
    max-width: 340px;
    color: var(--text-soft);
    line-height: 1.5;
    transition: color 0.3s ease;
}
.footer-links-grid{
    display: flex;
    gap: 56px;
    flex-wrap: wrap;
}
.footer-col h4{
    margin-bottom: 18px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: color 0.2s ease;
}
.footer-col a{
    display: block;
    color: var(--text-soft);
    text-decoration: none;
    margin: 12px 0;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    cursor: pointer;
}
.footer-col a:hover{
    color: var(--gradient2-start);
    transform: translateX(5px);
}
.social-icon-set{
    display: flex;
    gap: 20px;
    margin-top: 20px;
}
.social-icon-set a{
    background: var(--card);
    width: 44px;
    height: 44px;
    border-radius: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--card-border);
    transition: all 0.25s cubic-bezier(0.2, 0.95, 0.3, 1.05);
    cursor: pointer;
}
.social-icon-set a svg{
    width: 22px;
    height: 22px;
    stroke: var(--text);
    stroke-width: 1.7;
    fill: none;
    transition: stroke 0.2s ease, transform 0.2s ease;
}
.social-icon-set a:hover{
    transform: translateY(-4px);
    background: var(--btn-hover);
}
.social-icon-set a:hover svg{
    transform: scale(1.1);
}
.footer-bottom{
    text-align: center;
    margin-top: 3rem;
    padding-top: 1.8rem;
    border-top: 1px solid var(--card-border);
    font-size: 0.8rem;
    color: var(--text-soft);
    transition: all 0.3s ease;
}

/* click glow */
.click-glow{
    position: fixed;
    width: 0;
    height: 0;
    border-radius: 50%;
    pointer-events: none;
    background: radial-gradient(circle, var(--accent-glow), transparent 75%);
    transform: translate(-50%, -50%);
    animation: glowPop 0.85s ease-out forwards;
    z-index: 10000;
    opacity: 0.6;
}
@keyframes glowPop{
    0%{ width: 0px; height: 0px; opacity: 0.7; }
    100%{ width: 500px; height: 500px; opacity: 0; }
    }