:root {
    --primary-color: #06b6d4;
    --primary-hover: #0891b2;
    --primary-light: rgba(6, 182, 212, 0.1);
    --danger-color: #f43f5e;
    --danger-hover: #e11d48;
    --bg-gradient: radial-gradient(circle at top right, #0f172a 0%, #1e293b 100%);
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(226, 232, 240, 0.1);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    --glass-border: rgba(255, 255, 255, 0.05);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.5;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Common Components */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 450px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

h1 {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 1.5rem;
    text-align: center;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

input, textarea {
    width: 100%;
    padding: 0.875rem 1.25rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    margin-bottom: 1.25rem;
    outline: none;
    transition: all 0.2s;
    color: white;
}

input::placeholder {
    color: #475569;
}

input:focus, textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(6, 182, 212, 0.15);
    background: rgba(15, 23, 42, 0.8);
}

button {
    width: 100%;
    padding: 0.875rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--primary-color);
    color: #083344; /* Darker text for better contrast on cyan */
}

.btn-primary:hover {
    background: #22d3ee;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(6, 182, 212, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-danger {
    background: rgba(244, 63, 94, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(244, 63, 94, 0.2);
}

.btn-danger:hover {
    background: var(--danger-color);
    color: white;
    transform: translateY(-1px);
}

/* Custom UI Components */
.ui-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 20000;
    animation: fadeIn 0.3s ease-out;
}

.ui-modal {
    background: #1e293b;
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 400px;
    border: 1px solid var(--glass-border);
    animation: modalPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    color: white;
}

@keyframes modalPop {
    from { opacity: 0; transform: scale(0.9) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.ui-modal-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    text-align: center;
}

.ui-modal-body {
    margin-bottom: 2rem;
    color: var(--text-muted);
    text-align: center;
    font-size: 1.1rem;
}

.ui-modal-body input {
    margin-top: 1rem;
    text-align: center;
}

.ui-modal-footer {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.ui-modal-btn {
    width: auto;
    padding: 0.75rem 1.75rem;
    border-radius: 12px;
}

.ui-modal-btn-primary {
    background: var(--primary-color);
    color: #083344;
}

.ui-modal-btn-secondary {
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-muted);
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.ui-modal-btn-danger {
    background: var(--danger-color);
    color: white;
}

.ui-toast {
    position: fixed;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(12px);
    color: white;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--glass-border);
    z-index: 30000;
    display: none;
    animation: toastIn 0.4s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(40px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}
    background: #1e293b;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 2000;
    display: none;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastIn { from { opacity: 0; transform: translate(-50%, -20px); } to { opacity: 1; transform: translate(-50%, 0); } }