:root {
    --primary: #0891b2;
    --primary-hover: #0891b2;
    --bg-color: #0F172A;
    --card-bg: #1E293B;
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
    --input-bg: #0F172A;
    --input-border: #334155;
    --input-focus: #0891b2;
    --error-color: #EF4444;
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }
body { background-color: var(--bg-color); color: var(--text-main); display: flex; justify-content: center; align-items: center; min-height: 100vh; background-image: radial-gradient(circle at 15% 50%, rgb(8 145 178 / 18%), transparent 25%), radial-gradient(circle at 85% 30%, rgb(8 145 178 / 35%), transparent 25%); }
.login-container { width: 100%; max-width: 420px; padding: 2.5rem; background: var(--card-bg); box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5); border: 1px solid rgba(255, 255, 255, 0.05); backdrop-filter: blur(10px); }
.login-header { text-align: center; margin-bottom: 2rem; }
.login-header h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.5rem; background: linear-gradient(to right, #0891b2, #1f8da8ff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.login-header p { color: var(--text-muted); font-size: 0.95rem; }
.form-group { margin-bottom: 1.5rem; }
.form-label { display: block; font-size: 0.875rem; font-weight: 500; margin-bottom: 0.5rem; color: var(--text-muted); }
.form-input { width: 100%; padding: 0.75rem 1rem; background-color: var(--input-bg); border: 1px solid var(--input-border); border-radius: 8px; color: var(--text-main); font-size: 1rem; transition: all 0.3s ease; }
.form-input:focus { outline: none; border-color: var(--input-focus); box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2); }
.form-options { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
.checkbox-container { display: flex; align-items: center; gap: 0.5rem; cursor: pointer; }
.checkbox-input { appearance: none; width: 1.25rem; height: 1.25rem; border: 1px solid var(--input-border); border-radius: 4px; background-color: var(--input-bg); cursor: pointer; position: relative; }
.checkbox-input:checked { background-color: var(--primary); border-color: var(--primary); }
.checkbox-input:checked::after { content: '✓'; position: absolute; color: white; font-size: 0.875rem; top: 50%; left: 50%; transform: translate(-50%, -50%); }
.checkbox-label { font-size: 0.875rem; color: var(--text-muted); }
.forgot-link { font-size: 0.875rem; color: var(--primary); text-decoration: none; font-weight: 500; transition: color 0.3s; }
.forgot-link:hover { color: #0891b2; }
.btn-submit { width: 100%; padding: 0.875rem; background-color: var(--primary); color: white; border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: all 0.3s ease; }
.btn-submit:hover { background-color: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 6px 8px -1px #0891b2; }
.error-message { color: var(--error-color); font-size: 0.875rem; margin-top: 0.5rem; display: block; }