:root{--font-primary: "Inter", sans-serif;--font-tamil: "Noto Sans Tamil", sans-serif;--bg-color: #f4f7f9;--surface-bg-color: #ffffff;--text-primary: #1a1a1a;--text-secondary: #5c6770;--border-color: #e1e4e8;--accent-color: #007aff;--accent-color-hover: #0056b3;--shadow-color: rgba(0, 0, 0, .05)}.dark-mode{--bg-color: #121212;--surface-bg-color: #1e1e1e;--text-primary: #e0e0e0;--text-secondary: #a0a0a0;--border-color: #333333;--accent-color: #0a84ff;--accent-color-hover: #3b9eff;--shadow-color: rgba(0, 0, 0, .2)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-primary);background-color:var(--bg-color);color:var(--text-primary);line-height:1.6;transition:background-color .3s ease,color .3s ease}h1,h2,h3,h4,label{font-family:var(--font-tamil);font-weight:700}ul{list-style-type:none}button,select{font-family:inherit;cursor:pointer}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.app-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;background-color:var(--surface-bg-color);border-bottom:1px solid var(--border-color);box-shadow:0 2px 4px var(--shadow-color);position:sticky;top:0;z-index:1000}.app-header h1{font-size:1.75rem;color:var(--accent-color)}.controls{display:flex;align-items:center;gap:1.5rem}.control-group select{padding:.5rem 2.5rem .5rem 1rem;border-radius:8px;border:1px solid var(--border-color);background-color:var(--bg-color);color:var(--text-primary);font-size:1rem;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right .75rem center;background-size:16px 12px}.dark-mode .control-group select{background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23e0e0e0' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e")}#theme-toggle{background:none;border:none;padding:.5rem;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:background-color .2s ease,color .2s ease}#theme-toggle:hover{background-color:var(--bg-color);color:var(--text-primary)}#theme-toggle .moon{display:none}#theme-toggle .sun,.dark-mode #theme-toggle .moon{display:block}.dark-mode #theme-toggle .sun{display:none}.container{padding:2rem;max-width:1600px;margin:0 auto}.main-grid{display:grid;grid-template-columns:280px 1fr;gap:2rem;align-items:start}.nav-panel{display:flex;flex-direction:column;gap:1.5rem;position:sticky;top:100px}.nav-group{display:flex;flex-direction:column;gap:.5rem}.nav-group label{font-size:1.25rem;padding-left:.5rem}.control-select{width:100%;padding:.75rem 2.5rem .75rem 1rem;border-radius:8px;border:1px solid var(--border-color);background-color:var(--surface-bg-color);color:var(--text-primary);font-size:1rem;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right .75rem center;background-size:16px 12px}.dark-mode .control-select{background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23e0e0e0' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e")}.content-panel{background-color:transparent;padding:0;min-height:calc(100vh - 160px)}.kural-card{background-color:var(--surface-bg-color);border-radius:12px;box-shadow:0 4px 12px var(--shadow-color);margin-bottom:1.5rem;overflow:hidden;border:1px solid var(--border-color);transition:all .3s ease-in-out}.kural-card-header{padding:1.5rem;display:flex;align-items:center;gap:1.5rem}.kural-card-number{font-size:1.25rem;font-weight:700;color:var(--accent-color);flex-shrink:0}.kural-card-lines{font-family:var(--font-tamil);font-size:1.2rem;line-height:1.7}.loader{border:4px solid var(--bg-color);border-top:4px solid var(--accent-color);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:1rem auto}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (max-width: 1200px){.main-grid{grid-template-columns:240px 1fr}}@media (max-width: 992px){.main-grid{grid-template-columns:1fr}.nav-panel{position:static;flex-direction:row;gap:1rem}.nav-group{flex:1}.content-panel{min-height:auto}}@media (max-width: 768px){.app-header{flex-direction:column;gap:1rem;padding:1rem;position:static}.nav-panel{top:0;flex-direction:column}.container{padding:1rem}.main-grid{gap:1.5rem}.kural-card-header{padding:1rem;gap:1rem}.kural-card-lines{font-size:1.1rem}}