/* style.css - NexaUtility with multiple themes */
/* Base variables (Dark default) */
:root {
    --bg-gradient-start: #050b1a;
    --bg-gradient-end: #010101;
    --glass-bg: rgba(10, 20, 35, 0.6);
    --glass-border: rgba(0, 255, 255, 0.3);
    --text-primary: #eef5ff;
    --text-secondary: #a0b8e0;
    --accent-cyan: #00f2ff;
    --card-bg: rgba(12, 22, 40, 0.7);
    --card-hover: rgba(25, 45, 75, 0.85);
    --shadow-glow: 0 0 15px rgba(0, 242, 255, 0.3);
    --btn-primary: linear-gradient(135deg, #00c6ff, #9d00ff);
    --footer-bg: #02050c;
    --transition: all 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
}

/* Light theme */
body[data-theme="light"] {
    --bg-gradient-start: #f0f4ff;
    --bg-gradient-end: #e0e8ff;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 100, 200, 0.2);
    --text-primary: #1a2a4a;
    --text-secondary: #2a3f6e;
    --accent-cyan: #0077ff;
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-hover: rgba(240, 248, 255, 0.9);
    --shadow-glow: 0 0 15px rgba(0, 119, 255, 0.2);
    --btn-primary: linear-gradient(135deg, #0077ff, #00ccff);
    --footer-bg: #d0d8f0;
}

/* Neon theme */
body[data-theme="neon"] {
    --bg-gradient-start: #0a0f0a;
    --bg-gradient-end: #001a00;
    --glass-bg: rgba(0, 30, 0, 0.6);
    --glass-border: rgba(0, 255, 0, 0.5);
    --text-primary: #ccffcc;
    --text-secondary: #aaffaa;
    --accent-cyan: #00ff88;
    --card-bg: rgba(0, 40, 0, 0.7);
    --card-hover: rgba(0, 60, 0, 0.85);
    --shadow-glow: 0 0 15px rgba(0, 255, 100, 0.4);
    --btn-primary: linear-gradient(135deg, #00ff88, #00cc66);
    --footer-bg: #002200;
}

/* Midnight theme */
body[data-theme="midnight"] {
    --bg-gradient-start: #0a0a1a;
    --bg-gradient-end: #000010;
    --glass-bg: rgba(10, 10, 30, 0.7);
    --glass-border: rgba(100, 100, 255, 0.3);
    --text-primary: #ccddf8;
    --text-secondary: #8899cc;
    --accent-cyan: #88aaff;
    --card-bg: rgba(20, 20, 50, 0.7);
    --card-hover: rgba(40, 40, 80, 0.85);
    --shadow-glow: 0 0 15px rgba(100, 100, 255, 0.3);
    --btn-primary: linear-gradient(135deg, #6677ff, #8844ff);
    --footer-bg: #050510;
}

/* Ocean theme */
body[data-theme="ocean"] {
    --bg-gradient-start: #001e2f;
    --bg-gradient-end: #001020;
    --glass-bg: rgba(0, 40, 60, 0.6);
    --glass-border: rgba(0, 200, 255, 0.3);
    --text-primary: #bbe4ff;
    --text-secondary: #88ccff;
    --accent-cyan: #00ccff;
    --card-bg: rgba(0, 50, 70, 0.7);
    --card-hover: rgba(0, 70, 90, 0.85);
    --shadow-glow: 0 0 15px rgba(0, 200, 255, 0.3);
    --btn-primary: linear-gradient(135deg, #00aaff, #0066cc);
    --footer-bg: #001a2a;
}

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

body {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    background: radial-gradient(circle at 20% 30%, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text-primary);
    overflow-x: hidden;
    transition: background 0.4s ease, color 0.3s ease;
}

#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.8;
}

.content {
    position: relative;
    z-index: 2;
    backdrop-filter: blur(2px);
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 28px;
    transition: var(--transition);
}

.neo-input {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(4px);
    transition: var(--transition);
    color: var(--text-primary);
}

.neo-input:hover, .neo-input:focus {
    border-color: var(--accent-cyan);
    box-shadow: var(--shadow-glow);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 2rem;
    margin: 1rem 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-size: 1.9rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff, var(--accent-cyan), #ff44cc);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.controls {
    display: flex;
    gap: 1rem;
}

.lang-select, .theme-select {
    padding: 0.6rem 1.2rem;
    border-radius: 40px;
    font-weight: 500;
    cursor: pointer;
}

.hero {
    text-align: center;
    padding: 3rem 1rem 1rem;
}

.hero h1 {
    font-size: 3.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff, var(--accent-cyan), #ff55e6);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -1px;
}

.glow-text {
    text-shadow: 0 0 12px var(--accent-cyan);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { text-shadow: 0 0 0px var(--accent-cyan); }
    50% { text-shadow: 0 0 20px var(--accent-cyan); }
    100% { text-shadow: 0 0 0px var(--accent-cyan); }
}

.stats-badge {
    background: rgba(0, 255, 255, 0.12);
    border-radius: 60px;
    padding: 0.6rem 1.8rem;
    display: inline-flex;
    gap: 10px;
    backdrop-filter: blur(12px);
    border: 1px solid var(--accent-cyan);
    font-weight: bold;
    margin-top: 1rem;
}

.tools-section {
    padding: 2rem 2rem 3rem;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 1rem 1.8rem;
    margin-bottom: 2rem;
    gap: 1rem;
}

.search-box {
    flex: 3;
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(0,0,0,0.4);
    padding: 0.3rem 1rem;
    border-radius: 60px;
    border: 1px solid var(--glass-border);
}

.search-box input {
    background: transparent;
    border: none;
    width: 100%;
    padding: 0.7rem 0;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
}

.category-filter {
    padding: 0.5rem 1.8rem;
    border-radius: 40px;
    background: rgba(0,0,0,0.5);
    color: var(--text-primary);
    cursor: pointer;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 1.8rem;
}

.tool-card {
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border-radius: 2rem;
    padding: 1.4rem;
    transition: var(--transition);
    border: 1px solid rgba(0, 242, 255, 0.2);
    cursor: pointer;
}

.tool-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--accent-cyan);
    box-shadow: var(--shadow-glow);
    background: var(--card-hover);
}

.tool-icon {
    font-size: 2.2rem;
    margin-bottom: 0.7rem;
    color: var(--accent-cyan);
}

.tool-title {
    font-weight: 700;
    font-size: 1.2rem;
}

.tool-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0.5rem 0 1rem;
}

.tool-use-btn {
    background: linear-gradient(90deg, #2a3f6e, #1a2a4a);
    border: none;
    padding: 0.6rem;
    border-radius: 2rem;
    width: 100%;
    font-weight: 600;
    transition: 0.2s;
    cursor: pointer;
    color: white;
}

.tool-use-btn:hover {
    background: var(--btn-primary);
    box-shadow: 0 0 12px var(--accent-cyan);
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    margin-top: 2.5rem;
}

.page-btn {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    transition: 0.2s;
    cursor: pointer;
    color: var(--text-primary);
}

.page-btn.active, .page-btn:hover {
    background: var(--accent-cyan);
    color: black;
    border-color: white;
}

/* Knowledge Hub */
.knowledge-hub {
    max-width: 1400px;
    margin: 3rem auto 1rem;
    padding: 0 1.5rem;
}

.section-header {
    text-align: center;
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 2rem;
    background: linear-gradient(135deg, #fff, var(--accent-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.articles-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.article-card {
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border-radius: 1.5rem;
    border: 1px solid rgba(0, 242, 255, 0.2);
    transition: 0.25s ease;
    overflow: hidden;
}

.article-card summary {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 1.5rem;
    cursor: pointer;
    list-style: none;
}

.article-card summary::-webkit-details-marker {
    display: none;
}

.article-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: var(--shadow-glow);
}

.article-icon {
    font-size: 2rem;
    min-width: 50px;
    text-align: center;
    color: var(--accent-cyan);
}

.article-info {
    flex: 1;
}

.article-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.article-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.expand-icon {
    font-size: 1.2rem;
    transition: transform 0.3s;
}

.article-card[open] .expand-icon {
    transform: rotate(180deg);
}

.article-content {
    padding: 0 1.5rem 1.5rem 4rem;
    border-top: 1px solid rgba(0, 242, 255, 0.2);
    color: var(--text-secondary);
    line-height: 1.6;
}

.article-content a {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 500;
}

.backlink-badge {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--glass-border);
    font-size: 0.85rem;
}

footer {
    background: var(--footer-bg);
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
    border-top: 1px solid var(--glass-border);
}

.review-email a {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: bold;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(16px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    max-width: 580px;
    width: 90%;
    padding: 2rem;
    border-radius: 32px;
    position: relative;
    animation: modalPop 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
}

@keyframes modalPop {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-close {
    position: absolute;
    top: 18px;
    right: 24px;
    font-size: 28px;
    cursor: pointer;
    transition: 0.2s;
}

.modal-close:hover {
    color: var(--accent-cyan);
    transform: rotate(90deg);
}

.tool-action-area input, .tool-action-area textarea, .tool-action-area select {
    width: 100%;
    background: #0c1428;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 0.8rem;
    margin: 0.6rem 0;
    color: white;
    font-family: monospace;
}

.action-btn {
    background: var(--btn-primary);
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: 40px;
    font-weight: bold;
    margin: 0.6rem 0;
    cursor: pointer;
    color: white;
    transition: 0.2s;
}

.action-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 0 12px var(--accent-cyan);
}

.output-area {
    background: #00000066;
    border-radius: 20px;
    padding: 1rem;
    margin-top: 1rem;
    font-family: monospace;
    overflow-x: auto;
}

.copy-btn {
    background: rgba(0,242,255,0.2);
    border: none;
    border-radius: 20px;
    padding: 0.3rem 0.8rem;
    margin-left: 0.5rem;
    cursor: pointer;
    font-size: 0.7rem;
    transition: 0.2s;
}

.copy-btn:hover {
    background: var(--accent-cyan);
    color: black;
}

.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--accent-cyan);
    color: black;
    padding: 0.8rem 1.5rem;
    border-radius: 40px;
    font-weight: bold;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    box-shadow: 0 0 20px var(--accent-cyan);
}

.toast.show {
    opacity: 1;
}

@media (max-width: 700px) {
    .navbar { margin: 0.5rem; flex-direction: column; text-align: center; }
    .hero h1 { font-size: 2.2rem; }
    .article-content { padding: 0 1rem 1rem 1.5rem; }
}