/* Yöncü Looking Glass v4.0 - Premium Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    --green: #79a300;
    --green-light: #8fbf00;
    --green-dark: #5a7a00;
    --orange: #e67e00;
    --orange-light: #ff9a1f;
    --blue: #0ea5e9;
    --red: #ef4444;
    --bg: #050a0e;
    --bg-card: rgba(255,255,255,0.03);
    --bg-card-hover: rgba(255,255,255,0.06);
    --border: rgba(255,255,255,0.08);
    --border-hover: rgba(255,255,255,0.15);
    --text: #e8eaed;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    --surface: #0f1419;
    --radius: 12px;
    --radius-lg: 16px;
    --font: 'Inter', system-ui, -apple-system, sans-serif;
    --mono: 'JetBrains Mono', 'Consolas', monospace;
    --transition: 200ms cubic-bezier(.4,0,.2,1);
    --shadow: 0 4px 24px rgba(0,0,0,.4);
    --glow-green: 0 0 40px rgba(121,163,0,.15);
}

[data-theme="light"] {
    --bg: #f5f7fa;
    --bg-card: rgba(255,255,255,0.8);
    --bg-card-hover: rgba(255,255,255,0.95);
    --border: rgba(0,0,0,0.08);
    --border-hover: rgba(0,0,0,0.15);
    --text: #1a1a2e;
    --text-muted: #64748b;
    --text-dim: #94a3b8;
    --surface: #ffffff;
    --shadow: 0 4px 24px rgba(0,0,0,.08);
    --glow-green: 0 0 40px rgba(121,163,0,.1);
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

/* Animated Background */
.bg-grid {
    position: fixed; inset: 0; z-index: 0;
    background-image: radial-gradient(rgba(121,163,0,.06) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}
[data-theme="light"] .bg-grid { background-image: radial-gradient(rgba(121,163,0,.08) 1px, transparent 1px); }

.bg-glow {
    position: fixed; border-radius: 50%; filter: blur(120px); pointer-events: none; z-index: 0;
    animation: glowPulse 8s ease-in-out infinite;
}
.bg-glow-1 { width: 500px; height: 500px; top: -200px; right: -100px; background: rgba(121,163,0,.08); }
.bg-glow-2 { width: 400px; height: 400px; bottom: -150px; left: -100px; background: rgba(230,126,0,.06); animation-delay: 4s; }
[data-theme="light"] .bg-glow-1 { background: rgba(121,163,0,.05); }
[data-theme="light"] .bg-glow-2 { background: rgba(230,126,0,.04); }

@keyframes glowPulse { 0%,100% { opacity: .6; transform: scale(1); } 50% { opacity: 1; transform: scale(1.1); } }

.app-wrapper { position: relative; z-index: 1; max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; min-height: 100vh; display: flex; flex-direction: column; }

/* Header */
header { padding: 1rem 0; border-bottom: 1px solid var(--border); margin-bottom: 2rem; }
.header-inner { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.logo-link { display: flex; align-items: center; gap: .75rem; text-decoration: none; color: var(--text); }
.logo-icon { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--green), var(--green-dark)); border-radius: 10px; color: #fff; }
.logo-brand { font-weight: 700; font-size: 1.1rem; color: var(--green); }
.logo-sub { font-weight: 400; font-size: .85rem; color: var(--text-muted); display: block; line-height: 1.2; }
.header-nav { display: flex; align-items: center; gap: 1.5rem; }
.nav-links { display: flex; gap: .5rem; }
.nav-link { color: var(--text-muted); text-decoration: none; font-size: .85rem; font-weight: 500; padding: .4rem .75rem; border-radius: 6px; transition: all var(--transition); }
.nav-link:hover { color: var(--green); background: rgba(121,163,0,.1); }
.nav-controls { display: flex; align-items: center; gap: .5rem; }

/* Language Dropdown */
.lang-dropdown { position: relative; }
.lang-btn { display: flex; align-items: center; gap: .4rem; padding: .45rem .75rem; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-card); color: var(--text); cursor: pointer; font-size: .8rem; font-weight: 500; transition: all var(--transition); }
.lang-btn:hover { border-color: var(--green); background: var(--bg-card-hover); }
.lang-flag { font-size: 1rem; }
.lang-code { font-weight: 600; }
.lang-menu { position: absolute; top: calc(100% + 6px); right: 0; min-width: 180px; max-height: 360px; overflow-y: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); z-index: 100; display: none; padding: .25rem; }
.lang-menu.open { display: block; animation: fadeSlideIn .2s ease; }
.lang-option { display: flex; align-items: center; gap: .5rem; width: 100%; padding: .5rem .75rem; border: none; background: none; color: var(--text); cursor: pointer; font-size: .85rem; border-radius: 6px; transition: background var(--transition); text-align: left; }
.lang-option:hover { background: rgba(121,163,0,.1); }
.lang-option.active { background: rgba(121,163,0,.15); color: var(--green); font-weight: 600; }

/* Theme Toggle */
.theme-toggle { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-card); color: var(--text-muted); cursor: pointer; transition: all var(--transition); }
.theme-toggle:hover { border-color: var(--orange); color: var(--orange); }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }

/* Hero */
.hero { text-align: center; padding: 2rem 0 2.5rem; }
.hero-badge { display: inline-flex; align-items: center; gap: .5rem; padding: .35rem 1rem; border-radius: 50px; background: rgba(121,163,0,.1); border: 1px solid rgba(121,163,0,.2); font-size: .75rem; font-weight: 600; color: var(--green); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 1rem; }
.badge-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); animation: dotPulse 2s infinite; }
@keyframes dotPulse { 0%,100% { opacity: 1; } 50% { opacity: .4; } }

h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; letter-spacing: -.02em; background: linear-gradient(135deg, var(--green-light), var(--green), var(--orange)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: .5rem; }
.hero-desc { color: var(--text-muted); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }

/* Tool Tabs */
.tools-section { margin-bottom: 1.5rem; }
.tool-tabs { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: 1rem; padding: .35rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.tool-tab { display: flex; align-items: center; gap: .4rem; padding: .5rem .85rem; border: 1px solid transparent; border-radius: 8px; background: none; color: var(--text-muted); cursor: pointer; font-size: .8rem; font-weight: 500; font-family: var(--font); transition: all var(--transition); white-space: nowrap; }
.tool-tab:hover { color: var(--text); background: rgba(255,255,255,.05); }
[data-theme="light"] .tool-tab:hover { background: rgba(0,0,0,.04); }
.tool-tab.active { color: #fff; background: linear-gradient(135deg, var(--green), var(--green-dark)); border-color: var(--green); box-shadow: 0 2px 12px rgba(121,163,0,.3); }
.tool-tab svg { flex-shrink: 0; }

/* Glass Panel */
.glass-panel { background: var(--bg-card); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.75rem; box-shadow: var(--shadow); transition: all var(--transition); }
[data-theme="light"] .glass-panel { backdrop-filter: blur(10px); }

/* Form */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.25rem; }
.target-input { grid-column: 1 / -1; }
.input-group label { display: block; font-size: .8rem; font-weight: 600; color: var(--text-muted); margin-bottom: .4rem; text-transform: uppercase; letter-spacing: .5px; }
.input-with-icon { position: relative; }
.input-with-icon svg { position: absolute; left: .85rem; top: 50%; transform: translateY(-50%); color: var(--text-dim); pointer-events: none; z-index: 1; }
.input-with-icon input, .input-with-icon select { width: 100%; padding: .75rem .85rem .75rem 2.75rem; border: 1px solid var(--border); border-radius: 8px; background: rgba(255,255,255,.03); color: var(--text); font-size: .95rem; font-family: var(--font); outline: none; transition: all var(--transition); appearance: none; -webkit-appearance: none; }
[data-theme="light"] .input-with-icon input, [data-theme="light"] .input-with-icon select { background: rgba(0,0,0,.02); }
.input-with-icon input:focus, .input-with-icon select:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(121,163,0,.15); }
.input-with-icon select { cursor: pointer; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 2.5rem; }
.input-with-icon select option { background: var(--surface); color: var(--text); }
.hidden { display: none !important; }

/* Submit Button */
.form-actions { display: flex; justify-content: flex-end; }
.btn-run { display: inline-flex; align-items: center; gap: .5rem; padding: .75rem 2rem; border: none; border-radius: 8px; background: linear-gradient(135deg, var(--green), var(--green-dark)); color: #fff; font-size: .9rem; font-weight: 700; font-family: var(--font); cursor: pointer; transition: all var(--transition); text-transform: uppercase; letter-spacing: .5px; }
.btn-run:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(121,163,0,.4); }
.btn-run:active { transform: translateY(0); }
.btn-run:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn-run.loading { pointer-events: none; }
.btn-run.loading svg { animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Results */
.results-section { margin-bottom: 2rem; }
.results-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; padding-bottom: .75rem; border-bottom: 1px solid var(--border); }
.results-header h2 { font-size: 1rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; }
.results-actions { display: flex; align-items: center; gap: .5rem; }
.results-status { font-size: .75rem; font-weight: 600; padding: .25rem .6rem; border-radius: 4px; }
.results-status.pending { background: rgba(230,126,0,.15); color: var(--orange); }
.results-status.done { background: rgba(121,163,0,.15); color: var(--green); }
.results-status.error { background: rgba(239,68,68,.15); color: var(--red); }
.btn-icon { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--border); border-radius: 6px; background: none; color: var(--text-muted); cursor: pointer; transition: all var(--transition); }
.btn-icon:hover { border-color: var(--green); color: var(--green); }

/* Terminal */
.results-terminal { min-height: 200px; max-height: 600px; overflow: auto; font-family: var(--mono); font-size: .85rem; line-height: 1.7; padding: 1.25rem; background: rgba(0,0,0,.2); border-radius: 8px; color: var(--text); white-space: pre-wrap; word-break: break-all; }
[data-theme="light"] .results-terminal { background: rgba(0,0,0,.03); }
.terminal-welcome { text-align: center; padding: 2rem 0; color: var(--text-dim); }
.terminal-ascii { font-family: var(--mono); font-size: .7rem; line-height: 1.4; color: var(--green); margin-bottom: 1rem; white-space: pre; opacity: .6; }
.terminal-welcome p { margin-bottom: 1.25rem; }
.quick-tests { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; align-items: center; }
.quick-tests > span { font-size: .8rem; font-weight: 600; color: var(--text-muted); }
.quick-btn { padding: .35rem .75rem; border: 1px solid var(--border); border-radius: 6px; background: none; color: var(--green); font-family: var(--mono); font-size: .75rem; cursor: pointer; transition: all var(--transition); }
.quick-btn:hover { border-color: var(--green); background: rgba(121,163,0,.1); }

/* Result formatting */
.result-line { padding: 2px 0; }
.result-hop { color: var(--orange); font-weight: 600; }
.result-ip { color: var(--blue); }
.result-rtt { color: var(--green); }
.result-timeout { color: var(--red); opacity: .7; }
.result-label { color: var(--text-muted); font-weight: 600; }
.result-value { color: var(--text); }
.result-separator { border-top: 1px solid var(--border); margin: .5rem 0; }
.result-source { color: var(--orange); font-weight: 600; display: block; margin-top: .75rem; padding: .25rem 0; border-bottom: 1px dashed var(--border); }

/* Info Cards */
.info-section { margin-bottom: 3rem; }
.info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.info-card { padding: 1.5rem; border-radius: var(--radius); background: var(--bg-card); border: 1px solid var(--border); transition: all var(--transition); }
.info-card:hover { border-color: var(--border-hover); transform: translateY(-2px); box-shadow: var(--glow-green); }
.info-icon { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; border-radius: 10px; margin-bottom: 1rem; }
.info-icon-green { background: rgba(121,163,0,.12); color: var(--green); }
.info-icon-orange { background: rgba(230,126,0,.12); color: var(--orange); }
.info-icon-blue { background: rgba(14,165,233,.12); color: var(--blue); }
.info-card h3 { font-size: .95rem; font-weight: 700; margin-bottom: .35rem; }
.info-card p { font-size: .82rem; color: var(--text-muted); line-height: 1.5; }

/* Footer */
footer { margin-top: auto; padding: 2rem 0; border-top: 1px solid var(--border); text-align: center; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.5rem; margin-bottom: .75rem; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: .82rem; font-weight: 500; transition: color var(--transition); }
.footer-links a:hover { color: var(--green); }
.footer-copy { font-size: .78rem; color: var(--text-dim); margin-bottom: .25rem; }
.footer-powered { font-size: .75rem; color: var(--text-dim); }

/* Animations */
@keyframes fadeSlideIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.fade-in { animation: fadeIn .3s ease; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* RTL Support */
[dir="rtl"] .input-with-icon svg { left: auto; right: .85rem; }
[dir="rtl"] .input-with-icon input, [dir="rtl"] .input-with-icon select { padding-left: .85rem; padding-right: 2.75rem; }
[dir="rtl"] .lang-menu { right: auto; left: 0; }

/* Responsive */
@media (max-width: 768px) {
    .app-wrapper { padding: 0 1rem; }
    .header-inner { flex-wrap: wrap; }
    .nav-links { display: none; }
    .tool-tabs { gap: .25rem; padding: .25rem; }
    .tool-tab { padding: .4rem .6rem; font-size: .75rem; }
    .tool-tab span { display: none; }
    .form-grid { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr; }
    .hero { padding: 1.5rem 0 2rem; }
    h1 { font-size: 1.6rem; }
    .glass-panel { padding: 1.25rem; }
}
@media (max-width: 480px) {
    .tool-tab svg { width: 14px; height: 14px; }
    .footer-links { gap: 1rem; }
}