/* ==========================================================================
   Forms, Custom Dropdowns & Success Popups
   ========================================================================== */

.form-container {
    max-width: var(--container-form); margin: 0 auto;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-xl); padding: var(--space-3xl);
    box-shadow: var(--shadow-lg); position: relative;
}

/* ── Form Group ── */
.form-group { position: relative; margin-bottom: var(--space-2xl); }

.form-control {
    width: 100%; background: transparent; border: none;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-main); padding: 0.5rem 0;
    font-family: var(--font-sans); font-size: 1rem;
    transition: all var(--transition-base);
}

textarea.form-control { resize: vertical; min-height: 80px; }
.form-control:focus { outline: none; border-bottom-color: var(--accent); }

/* ── Floating Labels ── */
.form-label {
    position: absolute; left: 0; top: 0.5rem;
    color: var(--text-muted); font-size: 1rem;
    pointer-events: none; transition: 0.3s var(--easing);
}

.form-control:focus ~ .form-label,
.form-control:not(:placeholder-shown) ~ .form-label {
    transform: translateY(-1.5rem) scale(0.85);
    transform-origin: left; color: var(--accent);
}

/* ── Validation ── */
.form-group.error .form-control { border-bottom-color: #ef4444; }
.form-group.error .form-label { color: #ef4444; }
.form-group.error .form-control { animation: formShake 0.4s var(--easing); }

@keyframes formShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    50% { transform: translateX(8px); }
    75% { transform: translateX(-4px); }
}

.form-error-text {
    font-size: 0.75rem; color: #ef4444; margin-top: 0.25rem;
    opacity: 0; transform: translateY(-5px);
    transition: all var(--transition-base);
}

.form-group.error .form-error-text { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   Custom OS Dropdown
   ========================================================================== */

.custom-select {
    position: relative; width: 100%;
    margin-bottom: var(--space-2xl); font-family: var(--font-sans);
}

.select-trigger {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.5rem 0; border-bottom: 1px solid var(--border-light);
    color: var(--text-main); cursor: pointer;
    transition: border-color var(--transition-base);
}

.select-trigger:hover,
.select-trigger.active { border-bottom-color: var(--accent); }

.select-trigger svg {
    width: 16px; height: 16px;
    transition: transform var(--transition-base); flex-shrink: 0;
}

.select-trigger.active svg { transform: rotate(180deg); }

.select-options {
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg-card-hover); border: 1px solid var(--border);
    border-radius: var(--radius-md); margin-top: 0.5rem;
    opacity: 0; visibility: hidden; transform: translateY(10px);
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
    box-shadow: var(--shadow-md);
    max-height: 300px; overflow-y: auto;
}

.custom-select.open .select-options {
    opacity: 1; visibility: visible; transform: translateY(0);
}

.option {
    padding: 0.875rem var(--space-md);
    display: flex; align-items: center; gap: var(--space-md);
    cursor: pointer; transition: background 0.2s;
    color: var(--text-muted); border-bottom: 1px solid var(--border);
}

.option:last-child { border-bottom: none; }

.option:hover {
    background: rgba(255, 255, 255, 0.05); color: var(--text-main);
}

.option.selected {
    color: var(--accent); background: var(--accent-glow-subtle);
}

.os-icon {
    width: 20px; height: 20px;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.875rem; flex-shrink: 0;
}

.os-icon svg { width: 18px; height: 18px; fill: currentColor; }

/* ==========================================================================
   Success Popup
   ========================================================================== */

.success-popup {
    position: absolute; inset: 0;
    background: var(--bg-card); border-radius: var(--radius-xl);
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transform: scale(0.9);
    transition: all 0.5s var(--easing-bounce); z-index: 20;
}

.success-popup.show { opacity: 1; visibility: visible; transform: scale(1); }

.check-circle {
    width: 64px; height: 64px; border-radius: 50%;
    background: var(--accent-glow);
    display: flex; align-items: center; justify-content: center;
    color: var(--accent); margin-bottom: var(--space-lg);
}

.check-circle svg {
    width: 30px; height: 30px;
    stroke-dasharray: 50; stroke-dashoffset: 50;
}

.success-popup.show .check-circle svg { animation: drawCheck 0.6s 0.3s forwards; }
@keyframes drawCheck { to { stroke-dashoffset: 0; } }

.success-popup h3 { margin-bottom: var(--space-sm); }
.success-popup p { font-size: 0.875rem; margin: 0 0 var(--space-xl); text-align: center; }

/* ── Particle Trail ── */
.particle-trail {
    position: absolute; width: 4px; height: 4px;
    background: var(--accent); border-radius: 50%;
    pointer-events: none; opacity: 0;
}

.particle-trail.active { animation: particleTrailAnim 0.8s var(--easing) forwards; }

@keyframes particleTrailAnim {
    0% { opacity: 0.8; transform: scale(1); }
    100% { opacity: 0; transform: scale(0) translateY(-20px); }
}