@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
    --primary: #1a1a2e;
    --secondary: #00ffff;
    --accent: #8e44ad;
    --text: #e0e0e0;
    --text-dark: #2d2d3d;
    --background: #0f0f1e;
    --card-bg: #16213e;
    --border: #2a2a3e;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --font-family: 'Inter', 'Segoe UI', sans-serif;
    --font-heading: 'Space Grotesk', 'Segoe UI', sans-serif;
    --transition: all 0.3s ease;
    --radius: 12px;
}

/* ── Reset ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-family); background-color: var(--background); color: var(--text); line-height: 1.6; }
h1, h2, h3, h4 { font-family: var(--font-heading); }

/* ── Layout ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); }

/* ── Navbar ── */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: linear-gradient(135deg, rgba(26,26,46,0.95) 0%, rgba(26,26,46,0.85) 100%);
    border-bottom: 1px solid rgba(0,255,255,0.1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.nav-container { max-width: 1200px; margin: 0 auto; padding: 1rem var(--spacing-lg); display: flex; justify-content: space-between; align-items: center; }
.logo { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; background: linear-gradient(135deg, #fff 0%, var(--secondary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-menu { display: flex; list-style: none; gap: var(--spacing-lg); }
.nav-link { color: var(--text); text-decoration: none; font-size: 0.95rem; font-weight: 500; transition: var(--transition); position: relative; padding: 4px 0; }
.nav-link::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--secondary); border-radius: 2px; transition: var(--transition); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link:hover, .nav-link.active { color: var(--secondary); }

/* Hamburger */
.hamburger { display: none; flex-direction: column; cursor: pointer; gap: 5px; padding: 4px; background: none; border: none; }
.hamburger span { width: 25px; height: 3px; background: var(--secondary); border-radius: 2px; transition: var(--transition); transform-origin: center; display: block; }
.hamburger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ── Buttons ── */
.btn { display: inline-block; padding: var(--spacing-sm) var(--spacing-lg); border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; font-family: var(--font-family); cursor: pointer; text-decoration: none; transition: var(--transition); text-align: center; }
.btn-primary { background: linear-gradient(135deg, var(--secondary) 0%, #00cccc 100%); color: var(--text-dark); box-shadow: 0 4px 15px rgba(0,255,255,0.3); position: relative; overflow: hidden; }
.btn-primary::before { content: ''; position: absolute; width: 100px; height: 100px; background: radial-gradient(circle, rgba(255,255,255,0.5) 0%, transparent 70%); top: var(--y, 50%); left: var(--x, 50%); transform: translate(-50%,-50%); opacity: 0; pointer-events: none; transition: opacity 0.3s; }
.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(0,255,255,0.6); }
.btn-secondary { background: transparent; color: var(--secondary); border: 2px solid var(--secondary); }
.btn-secondary:hover { background: rgba(0,255,255,0.1); transform: translateY(-2px); }

/* ── Page Header ── */
.page-header { padding: var(--spacing-2xl) var(--spacing-lg); background: linear-gradient(135deg, rgba(142,68,173,0.1) 0%, rgba(0,255,255,0.05) 100%); border-bottom: 2px solid var(--secondary); }
.page-header h1 { font-size: 2.5rem; background: linear-gradient(135deg, #fff 0%, var(--secondary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: var(--spacing-sm); }
.page-header p { font-size: 1.1rem; color: var(--secondary); opacity: 0.9; }

/* ── Section headings ── */
h2 { font-size: 2.2rem; margin-bottom: var(--spacing-xl); background: linear-gradient(135deg, #fff 0%, var(--secondary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
h3 { color: var(--secondary); margin-top: 0; margin-bottom: var(--spacing-sm); }

/* ── Cards ── */
.card { background: var(--card-bg); border-radius: var(--radius); border: 1px solid var(--border); transition: var(--transition); }
.card:hover { border-color: var(--secondary); box-shadow: 0 10px 30px rgba(0,255,255,0.2); }

/* ── Footer ── */
.footer { background: var(--primary); border-top: 1px solid var(--border); padding: var(--spacing-xl) var(--spacing-lg); text-align: center; }
.footer p { opacity: 0.7; margin-bottom: var(--spacing-lg); }
.social-links { display: flex; justify-content: center; gap: var(--spacing-lg); flex-wrap: wrap; }
.social-link { color: var(--secondary); text-decoration: none; font-weight: 600; transition: var(--transition); }
.social-link:hover { opacity: 0.75; letter-spacing: 0.5px; }

/* ── Toast notification ── */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--card-bg);
    border: 1px solid var(--secondary);
    color: var(--text);
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    box-shadow: 0 8px 30px rgba(0,255,255,0.25);
    z-index: 9999;
    font-weight: 500;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.34,1.56,0.64,1);
    pointer-events: none;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { border-color: #00ff88; box-shadow: 0 8px 30px rgba(0,255,136,0.25); }
.toast.error { border-color: #ff4466; box-shadow: 0 8px 30px rgba(255,68,102,0.25); }

/* ── Animations ── */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideInUp { from { opacity: 0; transform: translateY(60px); } to { opacity: 1; transform: translateY(0); } }
@keyframes textGlow { 0%,100% { filter: drop-shadow(0 0 0px rgba(0,255,255,0)); } 50% { filter: drop-shadow(0 0 8px rgba(0,255,255,0.5)); } }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-20px); } }
@keyframes imageGlow {
    0%,100% { box-shadow: 0 0 40px rgba(0,255,255,0.5), inset 0 0 30px rgba(0,255,255,0.15); }
    50% { box-shadow: 0 0 60px rgba(0,255,255,0.7), inset 0 0 40px rgba(0,255,255,0.25); }
}

.fade-in { opacity: 0; }
.animate-in { animation: slideInUp 0.7s cubic-bezier(0.34,1.56,0.64,1) forwards; }

/* ── Responsive ── */
@media (max-width: 768px) {
    .hamburger { display: flex; }
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 65px;
        flex-direction: column;
        background: rgba(26,26,46,0.98);
        backdrop-filter: blur(12px);
        width: 100%;
        text-align: center;
        transition: 0.35s ease;
        padding: var(--spacing-lg) 0;
        border-bottom: 1px solid rgba(0,255,255,0.1);
        gap: var(--spacing-md);
    }
    .nav-menu.active { left: 0; }
    .page-header h1 { font-size: 1.8rem; }
    h2 { font-size: 1.6rem; }
    .btn { width: 100%; }
}

/* ── Blog Engagement: Likes + Comments ── */
.engagement { max-width: 820px; margin: var(--spacing-2xl) auto 0; padding-top: var(--spacing-xl); border-top: 1px solid var(--border); }
.like-row { display: flex; align-items: center; gap: var(--spacing-md); margin-bottom: var(--spacing-2xl); flex-wrap: wrap; }
.like-btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    background: var(--card-bg); border: 1px solid var(--border); color: var(--text);
    padding: 0.6rem 1.2rem; border-radius: 30px; cursor: pointer;
    font-size: 1rem; font-weight: 600; font-family: var(--font-family);
    transition: var(--transition);
}
.like-btn:hover { border-color: var(--secondary); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,255,255,0.2); }
.like-heart { color: #ff4466; font-size: 1.2rem; transition: transform 0.3s ease; }
.like-btn.liked { border-color: #ff4466; }
.like-btn.liked .like-heart { animation: heartPop 0.4s ease; }
.like-count { color: var(--secondary); }
.like-label { opacity: 0.6; font-size: 0.9rem; }
@keyframes heartPop { 0% { transform: scale(1); } 40% { transform: scale(1.4); } 100% { transform: scale(1); } }

.comments-block { margin-top: var(--spacing-lg); }
.comments-title { font-size: 1.4rem; margin-bottom: var(--spacing-lg); }
.comment-form { display: flex; flex-direction: column; gap: var(--spacing-md); margin-bottom: var(--spacing-2xl); background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--spacing-lg); }
.cf-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
.comment-form input, .comment-form textarea {
    background: var(--background); border: 1px solid var(--border); color: var(--text);
    padding: 0.75rem 1rem; border-radius: 6px; font-family: var(--font-family);
    font-size: 0.95rem; transition: var(--transition); width: 100%;
}
.comment-form input:focus, .comment-form textarea:focus { outline: none; border-color: var(--secondary); box-shadow: 0 0 10px rgba(0,255,255,0.2); }
.comment-form input.error, .comment-form textarea.error { border-color: #ff4466; }
.comment-form textarea { resize: vertical; }
.comment-form .btn { align-self: flex-start; }

.comments-list { display: flex; flex-direction: column; gap: var(--spacing-md); }
.comments-empty { opacity: 0.55; font-style: italic; }
.comment-item { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--spacing-md) var(--spacing-lg); }
.comment-head { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.4rem; }
.comment-avatar { width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, var(--secondary), var(--accent)); display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--text-dark); font-size: 0.9rem; flex-shrink: 0; }
.comment-author { font-weight: 600; color: var(--secondary); font-size: 0.95rem; }
.comment-date { opacity: 0.5; font-size: 0.8rem; margin-left: auto; }
.comment-body { opacity: 0.9; line-height: 1.7; font-size: 0.95rem; white-space: pre-wrap; word-wrap: break-word; }

@media (max-width: 600px) { .cf-row { grid-template-columns: 1fr; } }

/* ── Google auth for comments ── */
.auth-bar { display: flex; align-items: center; gap: var(--spacing-md); margin-bottom: var(--spacing-lg); flex-wrap: wrap; }
.google-btn {
    display: inline-flex; align-items: center; gap: 0.6rem;
    background: #fff; color: #3c4043; border: 1px solid #dadce0;
    padding: 0.6rem 1.2rem; border-radius: 8px; cursor: pointer;
    font-size: 0.9rem; font-weight: 600; font-family: var(--font-family);
    transition: var(--transition);
}
.google-btn:hover { box-shadow: 0 2px 10px rgba(0,0,0,0.25); transform: translateY(-1px); }
.auth-or { opacity: 0.55; font-size: 0.85rem; }
.signed-in-as { display: flex; align-items: center; gap: var(--spacing-md); margin-bottom: var(--spacing-lg); flex-wrap: wrap; font-size: 0.9rem; opacity: 0.9; background: rgba(0,255,255,0.06); border: 1px solid var(--border); border-radius: 8px; padding: 0.6rem 1rem; }
.signed-in-as strong { color: var(--secondary); }
.signout-link { background: none; border: none; color: var(--secondary); cursor: pointer; font-size: 0.85rem; font-weight: 600; text-decoration: underline; font-family: var(--font-family); }

/* ── Comment like/dislike ── */
.comment-actions { display: flex; gap: 0.75rem; margin-top: 0.75rem; }
.cvote {
    display: inline-flex; align-items: center; gap: 0.4rem;
    background: var(--background); border: 1px solid var(--border); color: var(--text);
    padding: 0.3rem 0.7rem; border-radius: 20px; cursor: pointer;
    font-size: 0.8rem; font-family: var(--font-family); transition: var(--transition);
}
.cvote:hover { border-color: var(--secondary); }
.cvote .cvote-count { opacity: 0.75; }
.cvote.clike.active { border-color: #00ff88; color: #00ff88; }
.cvote.cdislike.active { border-color: #ff4466; color: #ff4466; }
.cvote.active { cursor: default; }

/* ── Comment hint ── */
.comment-hint { font-size: 0.8rem; opacity: 0.55; margin-top: 0.5rem; }