/* =========================
   🎨 GLOBAL DESIGN SYSTEM
========================= */

:root {
    --bg: #0f172a;
    --card: #1e293b;
    --card-hover: #334155;

    --text: #ffffff;
    --muted: #94a3b8;

    --primary: #3b82f6;
    --primary-hover: #2563eb;

    --radius: 12px;
    --transition: 0.2s ease;
}

/* =========================
   RESET
========================= */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

/* =========================
   BASE
========================= */

body {
    background: var(--bg);
    color: var(--text);
}

a {
    color: inherit;
    text-decoration: none;
}

/* =========================
   LAYOUT
========================= */

.container {
    max-width: 900px;
    margin: auto;
    padding: 40px 20px;
    text-align: center;
}

/* =========================
   TYPOGRAPHY
========================= */

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

header p {
    color: var(--muted);
    margin-bottom: 30px;
}

/* =========================
   SEARCH
========================= */

.search-box input {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius);
    border: 1px solid #334155;
    outline: none;
    margin-bottom: 30px;
    font-size: 1rem;
    background: #0f172a;
    color: var(--text);
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary);
}

/* =========================
   GRID + CARDS
========================= */

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
}

.card {
    background: var(--card);
    padding: 25px;
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text);
    font-weight: bold;
    transition: var(--transition);
    cursor: pointer;
}

.card:hover {
    background: var(--card-hover);
    box-shadow: 0 6px 18px rgba(0,0,0,0.25);
    transform: translateY(-2px);
}

/* =========================
   TOOL PAGES
========================= */

.back {
    display: inline-block;
    margin-bottom: 20px;
    color: var(--muted);
    text-decoration: none;
    transition: var(--transition);
}

.back:hover {
    color: var(--text);
}

/* TOOL CONTAINER */
.tool-card {
    max-width: 420px;
    margin: auto;
    text-align: center;
    background: var(--card);
    padding: 25px;
    border-radius: var(--radius);
}

/* =========================
   INPUTS / SELECTS
========================= */

.tool-card input,
.tool-card select {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border-radius: var(--radius);
    border: 1px solid #334155;
    outline: none;
    background: #0f172a;
    color: var(--text);
    transition: var(--transition);
}

.tool-card input:focus,
.tool-card select:focus {
    border-color: var(--primary);
}

/* =========================
   BUTTONS
========================= */

.tool-card button {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    border: none;
    border-radius: var(--radius);
    background: var(--primary);
    color: white;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.tool-card button:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

/* =========================
   RESULT TEXT
========================= */

#result {
    margin-top: 20px;
    font-size: 1.2rem;
}

/* =========================
   PASSWORD TOOL
========================= */

.strength-bar {
    width: 100%;
    height: 10px;
    background: #334155;
    border-radius: var(--radius);
    margin-top: 10px;
    overflow: hidden;
}

#strength-fill {
    height: 100%;
    width: 0%;
    transition: 0.3s ease;
}

/* Tips */
#tips {
    text-align: left;
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--muted);
}

#tips li {
    margin: 5px 0;
}

/* =========================
   RESPONSIVE
========================= */

@media (max-width: 600px) {
    .container {
        padding: 20px 15px;
    }

    header h1 {
        font-size: 2rem;
    }
}

#speed-fill {
    height: 100%;
    width: 0%;
    background: var(--primary);
    transition: 0.3s ease;
}